- rename 'no_bg' argument to 'emboss' (and negated)
- added 'emboss' option for operator buttons.
- Addon UI Layout slight modifications, changed enable/disable buttons for checkbox, grey out text of disabled addons to make it obvious at a glance whats enabled.
- column expanded enums now align text to the left.
- renamed ui_item_enum_row to ui_item_enum_expand since its used for columns and rows.
path -> filepath (for rna and operators, as agreed on with elubie)
path -> data_path (for windowmanager context functions, this was alredy used in many places)