[attributetable] Usability improvements for filters
wms provider: make smooth pixmap transformation in wmts optional (followup 6604d2f81)
Fix for #7627, wrong label scaling in print or PDF

- Add shadow device dpi output (high resolution)
- [API] Add scaleToPixelContext method to QgsPalLayerSettings for better precision scaling
[FIX #7609] Fetch and cache data for sorting column in one query
Reduce width of histogram widget to fit better in new raster properties dialog
Set better default drop shadow parameters
Update new composer item Rendering group box

- Set form layout to match others in composer
- Add companion spin box for transparency slider
- Add syncGroup property for collapsible group box functionality
- Clean up some old commented-out code (replaced by QgsColorButton with alpha support)
translation update: cz by Jan
translation update: bosnian by Almir
german translation update