Motion Tracking: setting Keyframe A & B was not updating UI indicators

Entering the numbers in the keyframe field was not triggering a viewport
update, so the little green lines down in the cache area were only
change when the user e.g. changed the frame.

Now send appropriate notifiers.

Issue spotted in T86456 by sebastian_k.

Maniphest Tasks: T86456

Differential Revision: https://developer.blender.org/D10963

Fix T87150: bad points appearance in orthographic view

Points are drawn as half octahedron (aligned to the camera).
Getting the appropriate matrix for facing the camera would fail in in
orthographic view, points were not facing the camera (revealing their
missing other half octahedron)

Maniphest Tasks: T87150

Differential Revision: https://developer.blender.org/D10923

Fix T87267: Texture Paint stencil texture not drawing

Typo in {rBafcfc6eb0842}.

Maniphest Tasks: T87267

Differential Revision: https://developer.blender.org/D10915

Fix T87263: Animation decorator not working on Grease Pencil Build modifier Factor value

When having a checkbox and a value both in one row together with an
animation decorator it is questionable whether the decorator should act
on animating the checkbox or the corresponding value. At the moment,
usage in modifiers does not seem to be very consistent:

Here the animation decorator works for animating the checkbox:
- `Build` (greasepencil) > `Factor` (this was reported and is changed in
this patch to act on the value instead of the checkbox)
- `DataTransfer` > `Topology Mapping` > `Max Distance` (this I guess
should also act on the value instead of the checkbox)
- `Edge Split` > `Edge Angle` (questionable)
- `Mirror` > `Merge` (questionable)
- `Screw` > `Merge` (questionable)
- `Wireframe` > `Crease Edges` (questionable)

Here the animation decorator works for animating the value:
- `VertexWeightEdit` > `Group Add/Remove Threshold`
- `Decimate` > `Symmetry`

So in this patch only the behavior in the greasepencil Build modifier UI
is changed, since I think it is quite obvious that one would more often
use the decorator for animating the factor value than for animating the
checkbox.

Maniphest Tasks: T87263

Differential Revision: https://developer.blender.org/D10910

Fix T87236: crash reading file with grease pencil palettes

Caused by typo in {rB76689e851700}.

Since Palettes and bGPDpalette are not the same size, this would not
only cause a crash in versioning code, but could only go downhill from
here on.

Maniphest Tasks: T87236

Differential Revision: https://developer.blender.org/D10903

Fix T86932: Curve: pick shortest path missing update of active point drawing

For curves, we need to tag the curve ID_RECALC_COPY_ON_WRITE for batch
cache update (same as in {rB24b2fe50f3ec}).

Maniphest Tasks: T86932

Differential Revision: https://developer.blender.org/D10826

Fix T84623: Curve/Surface force not working in normal direction

Tweaking e.g. a field strength would then not use the curve/surface
normal anymore [but the object center instead].

If a curve has a forcefield with effector shape Curve (in code its shape
is PFIELD_SHAPE_SURFACE then), it wil get a SurfaceModifier.

Changing properties will free the SurfaceModifierData's bvhtree and mesh
And these dont get copied along when doing the CoW copy, these are
explicitly set to NULL. So this was also failing for meshes, not just
curves.

Without the mesh & bvhtree though, get_effector_data() will not set the
EffectorData's normal correctly (it is closest_point_on_surface() which
does this). And without the right EffectorData's normal, the effector
will of course work unexpected.

Going in and out of editmode made this work because that goes down this
route:
- BKE_object_handle_data_update
- BKE_displist_make_curveTypes
- do_makeDispListCurveTypes
- curve_calc_modifiers_post
-- BKE_mesh_new_nomain_from_curve_displist
-- we then have our desired updated mesh from the curve
-- this will also call the SurfaceModifiers deformVerts [which - given we
have a valid mesh - will update the bvhtree properly]

Also note that _animating_ the effector actually works, (have not done
the deep dive why this works, assume the curve geometry is updated in
this case)

So, now just carefully tag the curve ID_RECALC_GEOMETRY in
rna_FieldSettings_update for this specific case.

Maniphest Tasks: T84623

Differential Revision: https://developer.blender.org/D10092

Fix T48167: Mesh select random factor is not accurate

Selecting random percentage would not reliably guarantee the precise
percentage of selected elements now randomize an index array instead
and use the precise number of elements from this array.

Note that this change has only been made to edit-mesh
and should be applied to all random selection operators.

GPencil: Prevent RNA assignment of invalid materials in modifiers

Materials used in grease pencil modifiers have the requirement that they
are already used on the object. In the UI dropdown, this restriction is
ensured by calling uiItemPointerR with appropriate searchptr and
searchpropname, so only giving the user the choice of materials already
used on the object.

From python though, it was still possible to assign materials outside of
this this restriction. This led to reports like T86981 [which have been
partially solved by clamping the material index in the modifier code to
be in the valid range].

Now make sure we dont assign "invalid" materials through RNA by
appropriate RNA pointer functions.

This also adds a proper warning (red, alert) in case of the LineArt
modifier if such a invalid material is still in the file [same as other
modifiers already do].

Differential Revision: https://developer.blender.org/D10873

Fix T86654: wrong Vertex Interpolation option default when importing alembic caches

This resulted in bad motion blur from alembic animation when imported
after rB83980506957c (because it was now OFF by default).
When imported in a version prior to rB83980506957c and saved, this was
still working fine.

Vertex interpolation option introduced in rBbab2260b59c7 was defaulting
to ON (correct) in that commit, but was lost in rB83980506957c.

Now switch this to ON by default again.

Note: if you have a file that was (incorrectly) imported with a version
after rB83980506957c you'll have to enable Vertex Interpolation option
on every MeshSequenceCache modifier by hand.

Maniphest Tasks: T86654

Differential Revision: https://developer.blender.org/D10876