Blender Git Loki

UI: First changes in Edit Toolbar

- Add transform tools
- Move Bend, Mirror, Shear and ToSphere as Tools

Added debug shaders to find problems in f12

Merge remote-tracking branch 'remotes/origin/blender2.8' into soc-2018-npr

Annotation Eraser: Only erase the point within the cursor, not the whole segment

Fix: Crash in non-3d editors when using Annotations

The wrong shader was being used after removing the per-point
varying colors.

Merge branch 'blender2.8' into greasepencil-object

Change order of modes to reorder Pie menu

The Draw now is on N option and not in NW. In this way is easier change the most common modes (N, S, E, W)

T55445: Add custom properties panel to materials

UI: Harmonize Toolbar parameters

Some parameters have been moved to toolbar and removed from header.

Back opacity to annotations

This parameter is usefull to reduce visibility of annotations and was removed by error in a previous commit.

Modified UI for chaining.

Merge branch 'blender2.8' into greasepencil-object

UI: Improve Toolbar icons (group)

Now it's possible group new brushes

Fixed c function and glsl file names.

Hacky fix for Mode Switch Pie Menu overflowing to a submenu on GP Objects

With the introduction of the GP editing modes to the object/workspace
modes enum, this introduced a number of issues for the Ctrl-Tab mode
switching pie menu, e.g.
* To access any of the GP Editing modes, you had to first navigate to
the "More" sub-pie, before being able to see these values. In practice,
this was tricky to use, and not ideal.
* Particle Editing mode was also moved into a sub-pie by itself

This was due to the following reasons:
1) Pie Menus for Enums use the "static" enum define to determine
where items should go. This was done to ensure spatial consistency
of items (e.g. Edit is always in the "east" position).
2) Each pie menu layout is only allowed to contain 8 items.
(i.e. so that movements can be less precise, corresponding to the
main compass directions only)
3) The nature of the modes menu means that there is never any situation
where all menu items need to be visible at the same time. Usually,
there are only between 2-5 items in that menu at a time, and at least
6 of the items are only valid for a single object type each.

Several other solutions were tried, but this hack is the simplest fix.

Annotations: Show "Stroke Placement" options in the topbar again

We may have to introduce a dedicated setting here for use with the
annotation tools, since the GP Object version is quite different now.

Annotation Tools: Use different cursors to indicate that the tools are running

Assorted Cleanup/Fixes

Annotations: Dynamically updating layer-color preview icons + "Active Note" enum

This adds a new enum with dynamically-generated icons to show previews
for the icons associated with each GP layer used for annotations. This
enum is used as part of the UI for annotations (specifically, in the
topbar settings for the active tool), making it easier for users to
see what color strokes drawn using the active note/layer will look like.

I ended up needing to create a new icon type in BKE_icons.h so that
we can store references to the layer/color used.

Known issues:
* The icon seems a bit too big, and would look a bit nicer with
rounded corners. But there are too many issues with the UI roundbox
functions (e.g. _aa() makes colors too dark, and non-aa versions look
too rough).

* Changing layer colors doesn't redraw the icons. A manual refresh
(by mousing over the widget) is needed.

Cleanup: Whitespace