Blender Git Loki

Remove ability to delete data from the File Browser

This removes the ability to hit X or Del to delete data from inside the File Browser.

This was extremely dangerous because it didn't use the system trash/recycle bin. This made it a very dangerous operation with no way to get data back.

Later on, we should add support for the OS trash through native API's, but until then we will remove this feature from the keymaps.

This addresses T61412 and T64104

Fix icon for outliner temporarily hide

Fix default open outliner restrict columns

Regression introduced on 777a546c0c7.

UI: add 'App' menu besides the 'File' menu

This uses the Blender icon that previously activated the splash.

Menu items which apply to the application are located here:
startup file, app templates & preferences.

Eevee: Add per material option to cull backfaces

This is in order to have more flexibility and to have an explicit option
for final renders.

Preferences: Default ViewportAA

Due to recent changes the default aa samples in the viewport was set to
16, but should have been 8. This is due to how the old viewport quality
setting was interpreted by the workbench engine. This patch will respect
the same way to version the viewport quality to viewport_aa as the
workbench used to do this.

use string ref in llvm ir builder

deduplicate string ref code

use string ref in more places

use string ref in more places

use string ref for type names

new StringRefNull class

initial StringRef class

UI: move preferences save options into submenu

Avoid clutter in the UI by moving save/revert options into submenu,
only show the save button when auto-save is disabled.

Merge branch 'master' into functions

Merge branch 'master' into greasepencil-object

Fix T57203: Rotation overlaps scale gizmo handles

Gizmo: add depth bias for 3D selection

This allows some gizmos priority over others even when they're behind.

GPU: Add a matrix unproject function that takes an inverted matrix

This is normally already calculated so add a version that takes the
inverted matrix.

Cleanup: de-duplicate active tool panel