Fix turned out to remove as much "manual UI" from 3D view header as possible. Mode selector and all transform manipulators/orientations stuff are now RNA-based UI (leaving basically only edit mesh select modes with custom handlers, as they have some quite specific features).
To achieve this, four main modifications were done:
* enum-operator-generated menus are now MENU (i.e. dropdown lists) in headers too.
* All bit-flag enums expanded in ROW buttons now have a handling consistent with e.g. layers, or what we already have for transform manipulators, i.e. clicking select only one element, shift-click to select multiple ones.
* Consequently, the three RNA booleans manipulators flags are merged into a single bit-flag enum (yes, this is also an API change, though I doubt many scripts use it).
* Now the width of enum-based dropdown lists is computed from longest item name in enum, no more from a dummy place holder string (when no label/name is given).
All this allows to remove some code from 3DView/transform areas, that was actually mostly duplicating RNA/operator one.
Also done a few optimizations here and there (among others, do not pass &numitems to RNA_property_enum_items() when you do not need it, saves at least an iteration over enum items to count them).
Many thanks to Brecht for the reviews!
- Hide Manipulate center points in sculpt and particle edit modes
- Hide 3D manipulators and orientation from sculpt mode
- Hide snap buttons in sculpt, weight, texture, vertex and particle painting modes
All this options weren't make sense in this modes and might only confuse user.
This will resolve issue #30180: 3D View header buttons and modes
Crash was caused by data segment corruption near "string" in view3d_modeselect_pup().
Enlarged size of this static buffer, so it's now enough to store translated modeselect string.
It's not actually fixes because in some other language this modeline might be much longer
and it'll lead to corruptions again.
- some merges added lines in multiple times
- removed some NULL checks that were only in bmesh
- enable cycles by default (was disabled because it used not to work)
- make formatting match
