- create a dedicated set of buttons for addition of tags and smartgroups
to make those actions more visible as well as getting rid of th need to
select a tag/smartgroup to create those (turns out to be quite confusing
for newcomers)
- move UI elements around, regroup {add,remove,edit} symbol buttons to
harmonize with other parts of QGIS; the elements' placement feels much
more natural now
- A new favorite grouping system was added, which the symbols list
widget defaults to
- The selected tag / smartgroup in the symbols list widget now
persists when switching layers (and across sessions)
- The symbols list widget will update the tag / smartgroup combo
box when users add / rename / remove categories
- Users can now directly tag, as well as add to favorites, symbols
while saving those to the style database
- To streamline style management, groups have been removed and
fully replaced by tags
- Tags have been integrated into the import/export user interface
