Blender Git Loki

Merge branch 'blender2.7'

Cycles: Add utility to dump BVH tree as graphviz file

Cycles: Make BVH wider prior to packing

This allows to do more non-trivial tree modifications to make
it more dense and more friendly for vectorization.

Fix T60342: exception when creating cycles integrator or sampling preset

Fix T60338: Allow user to input units of another system

Fix T55336: Crash w/ dyntopo sculpt

Undo System: apply accumulation steps

Apply steps between the active and the undo state being decoded.

Fix sculpt redo failing to enable dyntopo

Fix memfile undo decoding creating undo steps

Exiting modes shouldn't be needed since loading the new memfile
will free the old data.

Sculpt mode dynamic topology was adding undo data on exiting the mode
which isn't logical in this case and can be avoided altogether.

Fix T59165: Text operations fail to undo

Some undo operations encode multiple actions, now all are undone/redone.

Avoid assert w/ recent sculpt changes on undo

Fix swapped active/selected lattice vertex color

UI: use keymap introspection for tooltip creation

Also support non existing keymap items which gave an error, see: T60335

WM: add keymap.find_from_operator(...)

Fix IS_EVENT_ACTIONZONE macro

Caused tweak events not to display.

Assert: add check to last commit

Object Mode: only toggle active object mode once

- When toggling a mode that doesn't support multi editing
only do this once of the active object.

- For sculpt mode create sculpt data since this is needed
for activating other sculpt objects on reload.

Fix T60044: Sculpting brush is not visible

Same logic as fix from D4153, but only applied when running undo.

Revert "Fix T60044: Sculpting brush is not visible on file load"

This reverts commit 4d8ed937f226f4cdfa6f62fde5306b14c217e9c5.

An alternative fix will come soon as a patch, since this introduced an issue.
Rolling back since the original fix (sculpt cursor on load) is less important
than the issue it introduced (crash on weight paint undo/redo).

Fix T60322.

Fix T60327: Value input with adaptive imperial units not working properly