Blender Git Loki

Property Search: Add search filter active tabs property

I also generalized the tab "adding" code in RNA to make it usable for filling
both the context enum and the active search filter tabs properties. The tab
layout code might need to be extended to add the idea of a custom
highlight property.

Property Search: Fix panels occasionally overlapping

Property Search: Fix panels animating when added

Merge branch 'master' into property-search-ui

Property Search: Properly filter box buttons

Property Search: Apply filter to operator buttons

Property Search: Move button tagging to separate function

Property Search: Solve memory leak

Property Search: Cleanup, remove unrelated changes

Merge branch 'master' into property-search-ui

Property Search: Support labels and expanded enums

Property Search: Support labels and array buttons

Merge branch 'master' into property-search-ui

Merge branch 'master' into property-search-ui

Property Search: Support heading labels

Property Search: Support checkboxes with no headings

Further changes will be needed to keep track of the labels added
for headings.

Property Search: Fix some filtered buttons not hidden

Property Search: Fix X margin accumulating for box panels

Property Search: Turn off search for add constraints buttons

Merge branch 'master' into property-search-ui