Blender Git Loki

Code Cleanup - Fix name of helper function to be less misleading

Fix: GP-related menus were only available in "Edit Mode" but not any of the other modes

Instead, the Object Mode menus were being shown, which could be quite confusing
and useless in general.

Fix more issues raised in code review

Merge branch 'greasepencil-object' of git.blender.org:blender into greasepencil-object

Fix after merge error

Merge branch 'blender2.8' into greasepencil-object

Code Cleanup - Style, indentation

Code Cleanup - Simplify code here based on issues raised in code review

Merge remote-tracking branch 'origin/blender2.8' into greasepencil-object

Merge remote-tracking branch 'origin/blender2.8' into greasepencil-object

Replace loop index to post addition

Fix wrong allocation

The allocation was allocating batches, but must be an array of pointers to batches.

Remove uses of BKE_gpencil_batch_cache_alldirty()

Remove more G.main uses

Remove G.Main from RNA code

Remove the use of global main in RNA functions

Merge branch 'blender2.8' into greasepencil-object

Fix Thickness curve intialization error

When reload file, the curve was not initializated and produces segment fault.

Cleanup: use relative imports in bl_ui

More changes missing in previous merge

Merge branch 'blender2.8' into greasepencil-object

Conflicts:
release/scripts/startup/bl_ui/properties_scene.py
release/scripts/startup/bl_ui/space_clip.py
release/scripts/startup/bl_ui/space_image.py
release/scripts/startup/bl_ui/space_node.py
release/scripts/startup/bl_ui/space_view3d.py
release/scripts/startup/bl_ui/space_view3d_toolbar.py

Fix merge error

In a previous merge, this file was wrong.