Bugfixes for dxf export
Set raster no data color back to 0,0,0,0 and overwrite that in raster drawer only for PDF output. Fixes #9101 and #9343
Fix warning
add header installation of simplify methods
Merge pull request #1079 from 3nids/uioptionbase

UI: remove top labels, use collapsible groupboxes, and other small improvements
UI: dialog base: add current category to dialog title if in icon only mode