Blender Git Loki

Fix strings not translated

Fix missing dot for .gltf file recognition

General minor cleanup

* Remove dead code
* Correct comment position
* Use enum and bitshifting for PanelType.flag
* Remove final point from UI message

Merge branch 'master' into filebrowser_redesign

Merge branch 'master' into filebrowser_redesign

Fix size column text missing when date column is disabled

Merge branch 'master' into filebrowser_redesign

UI: File Browser Large Thumbnails with Drives

This updates the prvicon sheet to a version that includes storage drives

Fix warnings

Add prominent button to toggle properties sidebar

Located at the lower left.

Only add new properties sidebar when there is an operator to execute

So don't add the sidebar (not even hidden) when the file browser is
opened as regular editor.

Only show new properties sidebar for specific operators

Don't limit with of execute region by tool properties region

Add right sidebar region for operator properties

This always shows up right now. Hiding it correctly still has to be
done.

Merge branch 'master' into filebrowser_redesign

UI: File Browser Use Friendly Relative Dates

Show 'Today' or 'Yesterday' in file list

UI: File Browser Icons That Allow Themes

This alters the prvicon sheet so icons are full opacity so can be themed later

UI: File Browser with Light Background

This uses dark icons if using a theme with light background

Correction to prev. commit: Avoid multiple specific file format types

Use a single generic `FILE_TYPE_OBJECT_IO` instead of specific ones
(e.g. `FILE_TYPE_FBX`). We better leave as many bits free as we can
(this is stored in files).

Icons: Add support for 3d model file types

OBJ, 3DS, GLTF, FBX, Collada