Blender Git Loki

Fix crash with select linked when nothing is under the cursor

There is no object to update anyways, and there is no valid basact when the
nified_findnearest() test fails.

How to reproduce the bug: Try to select linked (L) with selected faces but
withotu mouse hovering any mesh.

Bug introduced on: rBbfc9d426bb95 (original multi-object edit commit).

Edit-mesh: multi-object select less

Edit-mesh: multi-object select more

Fix missing show_weight from overlay UI

Missed when moving settings out of the mesh.

Show the 3D cursor by default

Was committed as part of unrelated change: D3198.

Fix extrude glitch where undo state was visible

EditMesh: initial extrude manipulator

This manipulator is a test for mixing do/redo,
there are still some glitches that need sorting out in
transform & the undo stack.

Transform: support initial offset option

Needed to redo extrude+transform macro w/o resetting the translation.

WM: manipulator redo support

Support for adjusting a setting from the last executed operator.

Merge branch 'master' into blender2.8

WM: include macros in last-properties

Needed for 2.8 tool system storage of macro properties.

IDProp API: use stored string length for IDP_repr

Also NULL check ID pointers.

Fix T54801: incorrect render with zero weight transparent BSDFs.

Fix crash on armature drawing

Armature: Fix object mode display.

Don't show wires if not selected.
Bone outline size match meshes outlines.

Armature: Change Bone drawing.

This makes a few changes:
- Remove the old "overlay" wires.
- Add constraints colors to bones.
- Specify a a new "hint" color per bone. Making selection/Active state
more obvious.
- Unify Octahedral/B-Bones/Envelope shading and colors.
- Change outline size depending on the selection/active state of the bone.

Note that thoses changes are not final and needs review.

Armature: Rename bone shaders and add 2 colors smooth blending.

This will enable us to do more nice stuff in future commits.

This commit is a temporary commit, it will compile but will crash if
trying to display any armature. Next commit does work.

Armature: Outline: Fix outline detection in critical cases.

Outline was not generated because the normal was completely orthogonal to
the view.

Armature: Make bone outlines thickness variable.

Armature: Set outline width to 2.0.

Correspond roughly to 1px width.