Blender Git Loki

LANPR: Collection usage flag now effective.

Fluid: Used procedural lines to draw gridlines

Merge remote-tracking branch 'origin/master' into lanpr-under-gp

# Conflicts:
# release/datafiles/locale
# release/scripts/addons

Theme: Add theming for collection colors

Add a new panel similar to the Bone Color Sets panel to set the
collection colors. These draw in the outliner and outliner context menu.

Collection Colors: Add icons

Add square icons for collection color tags. These are still using
hard-coded colors but it would be easy to add them to the themes now.

Cleanup: spelling

UI: Add Edge Loopcut Slide to edge menu

This was exposed in the context menu but not the main edge menu.

Fix T78551 EEVEE: Fix memleak from renderpass ubo

Fix T78124 Overlay: Image: Camera background image transparency not working

This changes to premultiplied blending for all cases and put the premult
in the shader.

Merge branch 'master' into soc-2020-outliner

Fix T77559 Avoid wrong ob->imat leading to several bugs

This fixes T77559 Scale to zero in object mode unable to select

Merge branch 'master' into property-search-ui

Fix: show python evaluation errors in info editor

printing PyErr also clear it. That caused only syntax errors to be printed

GPencil: Fix crash when moving multiple handles

Fix a crash when selecting multiple handles (without the control point)
and then moving them. This was caused by the function
BKE_gpencil_curve_sync_selection which did not sync the
selection correctly. GP_CURVE_SELECT would not be set in gpc->flag if an
individual handle was selected.

Fix T78527: GPencil Mirror modifier is inconsistent with Mesh Mirror (redo)

Simply the same code the regular mesh mirror modifier uses.

Differential Revision: https://developer.blender.org/D8188

UI: rename Alpha to Opacity

There was a discrepancy between the Tooltip of the Camera's Background Image that controls the opacity of the image and the operator's name that reads Alpha. The tooltip says **"Image opacity to blend the image against the background color"**, so it was renamed to Opacity to follow the tooltip.
The decision for this change is that the naming Alpha is not the most appropriated, since it has nothing to do if a loaded image has an embedded Alpha channel or not.

{F8540101}

Reviewed By: #user_interface, pablovazquez

Differential Revision: https://developer.blender.org/D7760

UI: Replace "Grease Pencil" with "Annotation" in user-facing options in the Clip editor

This revision affects the menu under: Clip > Track > Detect Features > Placement.
A bit of UI that was probably missed when the legacy GP was renamed to Annotation

{F8647693}

In this state, it may be confusing for the user.

Reviewed By: Blendify

Differential Revision: https://developer.blender.org/D8139

GPencil: Fix crash when moveing a point in edit mode

Cleanup: Remove useless duplicated lines

I spotted a duplicate struct declaration, so I had to check for other duplicated as well
There might be some other but i am not confident enough for deleting them

this regex search for duplicate ^(.*;)$n(1)$

Reviewed By: JacquesLucke

Differential Revision: https://developer.blender.org/D8146

UI: Dont abbriviate location & rotation

This resolves one of the last few areas where we still use inappropriate
abbreviations. Reading abbreviated words is usually slower, because
users must parse, guess and translate the words. Using abbreviations
such as 'rot' is also especially bad since it's a word in itself too.

The main advantage of abbreviations is that they are faster to *write*,
which just isn't a concern for text in the UI.

Differential Revision: https://developer.blender.org/D8174