Blender Git Loki

Fix: Pass a usable EvaluationContext to GP Modifiers

This is needed for some modifiers (e.g. Build), which rely on time

Fix: Alt-Shift-SelectMouse wasn't working to add an entire stroke to the current selection

GP Object: Added missing support for the "Apply Transforms" operators

Cleanup: Style fixes

Fix: Crash when unhiding a GP layer in the dopesheet if the frame has changed in the meantime

Pre-emptive fixes for crashes occurring when GP strokes have no palette/color info assigned

Cleanup: Remove a whole bunch of manual GP cache tagging (marked for review)

Fix: Added "missing link" preventing depsgraph id_tag getting to GPencil updates

This was causing problems like making the modifier show/hide button not
work for Grease Pencil objects

GP Modifiers: Finish porting over last modifier (Simplify) and Cleanup Code

Cleanup: Ported Lattice Modifier code over to new callbacks

Cleanup: Use vec2f instead of defining our own 2d point type

Outliner: Indicate which GP layer is active

Active layers get the colored pencil, while inactive ones get the dot

Outliner now displays icons for GP Modifiers

GP Modifiers: Replace defunct "Duplication" modifier with "Build" modifier

It doesn't actually do anything now, and most of its properties are
undefined as well, but we don't want to break any existing files now
(as renumbering the other modifiers would cause issues)

Note: BKE_gpencil_reset_modifiers() has been removed. If the array modifier
needs this, we will have to find another solution to this.

Fixes to various GP Modifiers

* Array modifier can be shown in editmode
(TODO: When "Make Objects" is enabled, this breaks)

* Color (hue/sat) modifier was still using G.main
-> Updated to use palette slots instead

Fix: Inconsistent behaviour between different GP array modifier cases

The main culprits here were:
1) Wrong order of matrix multiplication (resulting in inverted grid layout)

2) Directly reading off diagonals from matrix as scale, which failed when
objects were rotated

Cleanup: Remove a bunch of redundant/bad old code

Fix UI breakage (GP Modifiers / 3D View header) after ob->gpd --> ob->data refactor

GP Array Modifier: Bring back draw-engine hack for array modifier drawing

This time, it only runs when "Make Objects" is enabled on a modifier,
giving users a workaround for the z-ordering problems.

Fix: GP Modifiers UI was broken during the ob->gpd --> ob->data refactor