Blender Git Loki

Fix T55564: Cycles OpenCL build error on some scenes.

Cleanup: Replaced space tabs with real tabs

Merge branch 'master' into blender2.8

UI: Simplify Panel default closed

Fix T55568: second click event ignored

Double-click handling caused the second click to be ignored
for keymaps that only handle click.

Add depsgraph support for gpencil_modifiers_foreachTexLink

More depsgraph missing: modifiers_foreachIDLink

Continue modifying files. Don't compile!

Changes to integrate depsgraph evaluation for modifiers

Still pending:

- void DepsgraphNodeBuilder::build_object
- void DepsgraphRelationBuilder::build_object

Merge branch 'master' into blender2.8

Fix T55491: Double click fail in menu popups

Merge branch 'blender2.8' into greasepencil-object

New functions for ID Linking

Added almost all offline render code. adaptation pending, don't compile!

WM: don't make LMB a special case for double click

CodeStyle: Comments

Code cleanup: Added newline

Missed warning is previous commit

Studiolight: Calculation of irradiance buffer

The calculation of the irradiance buffer was slow. Now it is only
calculated when it is being used (background_alpha > 0.0)
this solves the freeze when switching to LookDev mode.

Also changed the default calculation to use the Spherical Harmonics
calculation. This is able to generate the irradiance buffer fast, but is
less accurate. As the irradiance buffer is only used for visual
guidance speed is more important than accuracy.

Added compile directive to switch between the implementations.
(see STUDIOLIGHT_IRRADIANCE_METHOD)

Disabled caching the irradiance buffer when
STUDIOLIGHT_IRRADIANCE_METHOD_SPHERICAL_HARMONICS is used as it is not
needed.

Fix: Ensure that summary channel is enabled when creating timeline