Blender Git Loki

Fix T56181: Annotations hide proportionnal editing UI buttons

KnifeTool: Use GPUBatch API instead of IMM to fix buffer overflow issue

This also include a small optimisation (remove of a double loop and half of
the memory allocation for hit points)

This should fix T55946 Crash using knife tool on mesh with large number of
vertices.

Tried with a 500K vert suzanne and it seems fine.

Revert "Gitignore: Ignore diffs in all subdirs"

This is an issue for some file in the extern dir

This reverts commit d940a081a9f1f4106a5d2d155682695b0a6b0cb6.

Gitignore: Ignore diffs in all subdirs

Fix crash when rendering viewport within another area

This also Fix T55574 Crash on sequencer preview

GPUFrameBuffer: Put active framebuffer in GPUContext

instead of being ThreadLocal and leading to incorrect usage.

We still enforce no framebuffer when changing context. We can lift this
restriction later.

GPU: Replace malloc/calloc/realloc/free with MEM_* counterpart

Fix set_pixel overflow in fill brush

The value of the index was above the size of image

Fix: Motion Paths were still visible after clearing them

After clearing motion paths from objects, those objects needed to be
tagged for copy on write so that the copied data (i.e. viewport)
recieve the changes (i.e. removed paths)

Reported by Hjalti

UI: Grease Pencil Simplify tweaks

Single-column layout and tweaks to tooltips.

Change Brush smooth factor to 0.1 by default

The old values were too high.

Set overlay default values

Enable ghost onion skin by default

This option was changed by error when implement annotations.

Fix grease pencil line toggle

Replace with generic context toggle operator.

Fix T55718: Blender 2.8 crashes when converting to Curve from Mesh.

We only want to care about runtime.mesh_orig if? data is indeed a Mesh! ;)

UI: Grease Pencil Onion Skin minor tweaks

Avoid double label for same properties in single-column.
Onion Skinning: Group custom colors together, and frame before/after together.

Small changes to tooltips.

UI: remove grease pencil settings from topbar

Top bar is only for settings that apply to the next action
not a way to change existing data.

If each stroke could have a different color this would work as expected,
however it was adjusting the current layer color.

Fix cmake external library build for blosc/freetype on some systems.

UI: Metadata panel tweaks

Rename "Seq. Strip" to Strip Name, "Sequence Strip" to Use Strip Metadata.
Plus re-arrange of properties and separators for sections.

Thanks @fsiddi for the feedback.

Fix (unreported) wrong logic in gpencil UI code.