Blender Git Loki

Fix tooltip for constraints' subtarget.

Thanks @aligorith for the head-up.

Workbench: selection method for studio lighting

Workbench: studiolight

Fix: Tag armature for copy on write when selecting bones, so active bone gets updated

Note: This still needs some copy-on-write magic to get the bone pointers
to get remapped properly (e.g. evaluated pose still refers to original
arm->bones, and arm->act_bone isn't getting remapped).

Merge branch 'master' into blender2.8

Cleanup: factorize RNA constraint targets definition.

No expected changes in behavior from that commit!

Fix crash selecting envelope bone joint

Render preview: Assign proper depsgraph for icon preview

Wondering why it only was visible when running without copy on write.

Depsgraph: Fix missing action re-map with node tree update

After copying animation data we need to re-map action, otherwise
our original DNA values will go out of symc, causing flickering
when tweaking values on animated node tree.

Render preview: Make it to preserve unkeyed animation

The idea is to re-use evaluated datablock from within current context.

This relies on the following factors:

- It expects scene to be fully evaluated before preview jobs starts.
- It expects datablocks to be localized.

Restored HQ normals in Solidify modifier

Metaball: Move handles shader to draw/modes/shader and reference them in draw_common.c

Merge branch 'blender2.8' into tmp-static-override-insertion

Fix pose transformation helper lines

This was broken since 33bb8b785a9 (triple-buffer changes).
This also helps help lines as a whole.

Render preview: Remove dedicated depsgraph

It is not needed since render pipeline will create its own depsgraph.

Depsgraph: Tag IDs for animation update on visible update

Without this it's quite unpredictable what state of unkeyed changes
datablock will end up with.

Depsgraph: Fix threading conflict between node animation and shading update

Depsgraph: Fix wrong debug message

Fix sculpt grab cursor

This was broken since 33bb8b785a9 (triple-buffer changes).
We need to account to the area limits when drawing the cursor.

Fix for material/node tree localization

The workaround removal was wrong, the whole id->adt of a local
copy is to be NULL.

But now instead of modifying original datablock, we tell library
manager to not copy animation data.