Blender Git Loki

Merge branch 'master' into soc-2020-outliner

Outliner: Bone constraint drag&drop

Support bone constraints for drag and drop. A few issues still exist:
* Indices for all types for reorder aren't always correct.
* Bones are "supported" for modifiers and shader effects when they
shouldn't be.

Outliner: Fix uistack reorder highlights

Merge branch 'master' into soc-2020-outliner

Outliner: Add generic UI Stack drop operator

Replaces the modifier drop operator and works for modifiers,
constraints, and shader fx. Because these three elements share common
traits, it made the code simpler to combine the operator for all three.
Three types of actions are supported depending on where the element is
dropped:
* Drop within the same list to reorder.
* Drop on another object to copy.
* Drop the base (parent) element to link all to another object.

A few cases are yet unsupported but will be added to blenkernel.

Outliner: Remove creation order sort method

This was a placeholder while manual sort did not work. Manual sort
changes the "creation order" in the database lists so creation order was
the same ordering as manual.

Outliner: Add modifier copy with drag and drop

Allow copying single modifiers with drag and drop between objects. The
next step is to generalize the code for modifiers and use it for
contraints, modifiers, and shaderfx.

Merge branch 'master' into soc-2020-outliner

Outliner: Add gpencil effect props sync

Add properties tab sync when gpencil shader effects are selected.

Outliner: Draw gpencil shader effects in the tree

Draw the gpencil visual shaders in the outliner tree. Adds new TSE
types.

Outliner: Draw Gpencil modifiers in the tree

The outliner icon code had cases for grease pencil modifiers but the
modifiers did not actually draw.

Some icons are incorrect:
* Multiple Strokes
* Texture Mapping

Merge branch 'master' into soc-2020-outliner

Outliner: Draw collection icons in a row

UI: Fix drawing of aligned buttons in menu rows

This adds support for drawing icon buttons as a row in a popup menu. This is needed for drawing collection color tag icons in a row in the outliner context menu.

A few issues still exist, but I would like some initial review now that it mostly works.
* The icons do not draw aligned with the text labels. This is easy to fix, but the hover highlight is still drawn incorrectly.
* This works well when creating row icon buttons with an operator_enum, but manually creating the row elements doesn't draw an initial offset blank icon.

Differential Revision: https://developer.blender.org/D8317

Merge branch 'master' into soc-2020-outliner

Merge branch 'master' into soc-2020-outliner

Collection Colors: Change defaults

Collection Colors: Add 4 new color slots

Collection Tags: Use numbers rather than fixed color names

Outliner: Cleanup collection color preferences

Cleanup the excess labels and code.