Blender Git Loki

Masking: Cleanup, limit variable scope

Masking: Cleanup, indentation level

Masking: Cleanup, naming of mask layer

Solidify Modifier: support non-manifold input

This adds a new mode to solidify to support non-manifold geometry
with edges using 3 or more faces as input, resulting in a manifold mesh.

Since the differences between these methods don't translate well
into short terms, they're named "Simple" and "Complex" in the UI.

This also adds clamp with respect to angles
to the existing solidify modifier calculation.

Fix errors in fix for T68018

VSE: add a Set frame range to Strips operator

Add operator that sets the frame range, with an option to choose the regular or the preview one, around the selected strips.

Reviewed By: ISS

Differential Revision: https://developer.blender.org/D6078

UI: Fix preview frame range drawing in sequencer and driver editors

Draw preview range overlay in the video sequencer in the same way as in the other animation editors
Add color control in the theme.
Prevent overlay to be drawn in the driver editor.

Reviewed By: ISS

Differential Revision: https://developer.blender.org/D6074

Merge branch 'blender-v2.81-release'

Fix T68018: Crash on building movie proxy

Skip building proxy if directory can not be created.

Crash happens, when setting custom dir to location of source file itself.
This results in attempt to create directory with the same name as source file.

Differential Revision: https://developer.blender.org/D6148
Reviewed By: sergey

Merge branch 'blender-v2.81-release'

Fix T71284: batch rename escape's dashes

Merge branch 'blender-v2.81-release'

GPencil: Some NULL checks missing in previous T71260 fix

Merge branch 'blender-v2.81-release'

GPencil: Fix unreported visual problem for short strokes

When the stroke has less than 3 points, but only the fill material is enabled, the stroke is invisible and makes the shaders to remove any fill because the shader start and end pointers are not correct.

Now, if the stroke has only fill, but it is not fillable, it is drawn with the stroke color to avoid the errors and these ghost strokes.

Merge branch 'blender-v2.81-release'

Fix T71260: GPencil crash when drawing very long lines

There were two problems:

1) When the buffer was reallocate, the pointer was corrupted.
2) Short variables were too small to hold long lines.

GPencil: Show selection in Stroke mode for single points

Merge branch 'blender-v2.81-release'

Merge branch 'blender-v2.81-release'