Blender Git Loki

Cleanup: Remove GPENCIL_OT_color_choose

This isn't used anywhere, and should really even need to be
used for any purpose.

Annotations: Don't display Annotations properties panel when GP data in context is for GP Object

Fix: Don't allow Annotation tool to paint on GP Objects and vice versa

Merge branch 'blender2.8' into greasepencil-object

Merge branch 'blender2.8' into greasepencil-object

Merge branch 'blender2.8' into greasepencil-object

Conflicts:
release/scripts/startup/bl_ui/space_view3d.py

Make Ruler works with Annotations not Grease Pencil object

Now, the ruler is using the annotation datablock (scene) and not a object with materials

Tweaks to GPENCIL_OT_new operator

* Correctly tag Annotation datablocks as such when adding them
* Add new layer by default. It saves users from having to manually
add one after adding the datablock anyway.

Fix: "New Note" didn't tag newly-created GP datablock for annotations when creating a new datablock

Cleanup: Use GPU_* calls instead of gl* in annotate_draw.c

Annotations: Change "New Layer" label to "New Note"

Make Annotations toggleable with main overlay switch

Rename Grease Pencil to Annotation

Some properties and flags are more clear if the name is annotation.

Also changed some text and tooltips.

Merge branch 'blender2.8' into greasepencil-object

User Prefs: Make it clearer which properties affect Annotations only vs GP + Annotations

Annotations: Change default color for new annotation layers

Although we've had a default color for new Grease Pencil layers for
years, hardly anyone ever changed the default color from the old
default of black. This commit changes this default to match the
color used in the annotation pencil icons, giving it a stronger
connection to the tool, and giving users a better default color
that will make the new strokes actually visible with the default
theme.

Annotations: WIP access to tool settings in topbar

Lots of stuff to fix still - Not final UI at all
(in terms of widgets + properties exposed)

What works now:
* Exposed access to the setting controlling the default color to use
when adding new layers
* Exposed access to change which color (layer) and thickness new strokes
get drawn with (as per the current implementation). Now all annotation
tools have tool settings exposed.

Big Todo's:
* Find a way to display color previews of GP Layers as icons
(e.g. how to register all the necessary icon_id's, etc.)
* Replace the prop_search() with an enum prop
* Separate annotation RNA type defines? Context issues? etc.

Annotation Eraser: Only operate on the active layer

Since we aren't exposing per-layer locks here (as we want to avoid
having lots of work enabling/disabling locks), the eraser now only
erases strokes on the active layer

Cleanup: Assorted little tweaks/moving code around

Annotation Eraser Tweaks

* Remove the "soft" modes from the annotation eraser. Now, erasing
strokes will immediately remove the stroke points. This works better
for annotation use cases, as when erasing strokes, you usually just
want to get rid of the notes quickly.

* Show eraser brush size setting in the topbar/tool settings when the
eraser tool is active. (Note: This setting still uses the userpref
setting, which we should move to the scene toolsettings instead
so that it doesn't get reset with each session)