Fix T94422: Shading/Normals break on array modifier caps

The array modifier does not necessarily tag normals dirty.
If it doesnt, normals are recalculated "internally" using the offset ob
transform. This was happening for the array items, but not for the caps.

Now do the same thing for caps.

Maniphest Tasks: T94422

Differential Revision: https://developer.blender.org/D13681

Fix T94295: VSE fades error when no suitable sequences selected

This errored out in two scenarios:
- current frame not in strips framerange (this was reported)
- no strips selected at all

Now handle these cases properly in the operator and give appropriate
report info.

Maniphest Tasks: T94295

Differential Revision: https://developer.blender.org/D13642

Cleanup: use BKE_pose_is_layer_visible in more places

This was added in rBd13970de8627, now use in more places.

Cleanup: clang format

Missed in rB7c9e4099854a, sorry.

Fix T92930: Outliner "Show Active" bone fails in certain situations

Outliner would frame the armature object instead of the bone if the bone
was on a hidden armature layer.

Similar to issues reported in e.g. T58068 and T80464, this is due to the
fact that `BKE_pose_channel_active` always checks for the armature layer
(and returns NULL if a bone is not on a visible armature layer).

Now propose to make this layer check **optional** (and e.g. from the
Outliner be more permissive). This also introduces
`BKE_pose_channel_active_if_layer_visible` which just wraps
`BKE_pose_channel_active` with the check being ON.

Maniphest Tasks: T92930

Differential Revision: https://developer.blender.org/D13154

Fix T94262: Grease Pencil Blur Effect DoF mode wrong

This was visible outside of camera view and was not respecting the
"Depth of Field" checkbox on the Camera properties.

Now return early if DoF should not be visible.

Maniphest Tasks: T94262

Differential Revision: https://developer.blender.org/D13631

Fix T93570: VSE image transforms in preview dont autokey

This was basically not implemented, do this via
`ED_autokeyframe_property` in a new dedicated function in
special_aftertrans_update.

Maniphest Tasks: T93570

Differential Revision: https://developer.blender.org/D13608

Fix T94137: GPencil: Eraser does not erase first point

The eraser checks the current, previous and next point (and sets pc0,
pc1 & pc2 corresponding to that for futher occlusion/brush/clipping
checks). For the very first point, it sets pc0 to pc1 [which makes sense,
there is no previous point, so we should assume the previous segment is
"visible" as soon as the first point is], but does so *before* pc1 is
even calculated. This makes following occlusion/brush/clipping checks
work with zero values [which leads to no earsing in most cases].

Now *first* calculate pc1, *then* set pc0 to pc1.

Maniphest Tasks: T94137

Differential Revision: https://developer.blender.org/D13593

Outliner ID Remap Users: hide ID type from the UI

The correct type should be set by invoke already, changing it to a non-
matching type (e.g. trying to remap Mesh users with a Camera block) does
not really make sense afaict, reason being that we would be presented
with the "Invalid old/new ID pair" message in such case anyways (code
checks GS(old_id->name) == GS(new_id->name)).

This alone wouldnt be a pressing issue, but since doing this with an
object ID type crashes atm., it seems to make sense to clean this up now
(of course the crash should be looked into, but this is for a separate
patch -- if that is solved, we could also think about adding the "Remap
Users" entry back in the context menu for objects as well [which was
removed in rB17bd5c9d4b1e for some reason]).

Part of T93799.

Differential Revision: https://developer.blender.org/D13512

UI: deduplicate code for Copy To Selected and Alt-button tweaking

This resolves an old TODO to deduplicate code in copy_to_selected_button
& ui_selectcontext_begin.
This is also in hindsight of adding id-property support [incl. Geometry
Nodes modifier properties] for this in the next commit.
No behavior change expected here.

ref T93983 & D13573