Blender Git Loki

Mirror modifier: Fix layout misalignments and simplify code

Meant as an example for changes to be applied everywhere.

Fix layout when using uiItemFullR() after uiItemL_respect_property_split()

Also make the decorator layout as return value easier to understand.

Merge branch 'master' into temp-checkbox-layout-tweaks

Fix broken split layout for operator properties popups

Was creating multiple nested split layouts. `uiDefAutoButsRNA()` used to
do it's own layout splitting, that's redundant now, so I removed it.

Solidify UI checkbox layout update

Image empty checkbox layout updates

Sequencer checkbox layout updates

Sculpt & paint UI checkbox layout updates

Camera and Curve obdata properties layout updates

Change manually split layouts to 40%

Mask modifier layout

C++ needs workaround for including BKE_screen.h and a
PanelDrawFn definition.

Update Preferences and Physics UI layouts for new checkboxes

Update Mesh obdata properties

Data transfer modifier UI update

Object properties layout update

Cleanup: Doxygen secionts, rename re_order -> reorder

Fix debug mode crash adding and deleting modifier

Update View Layer properties layout

Layout updates for Output Properties

Use 40/50% properties split layout