fix build on PyQt <4.9.5
doxymentation fix
indent multiline messages in log
Fix build error with SIP (4.15.5)
Show active visibility group in menu also in map composer map widget
Revert change of rule-based renderer identifier as it breaks project files
Renamed visibility "groups" to "presets" to avoid confusion with ordinary groups

If you have a project file using this functionality, you may need to run a simple
replace of "visibility-group" to "visibility-preset"
remove unused variable
german translation update
[processing] remove selection before running Select by location algorithm (fix #10873)
add relation reference widget to SIP
[Releation reference widget] more coherent method names
[Releation reference widget] use separate button for remove action
rename relreference...to relationreference
[TRANSUP] transifex string update

Signed-off-by: Werner Macho <werner.macho@gmail.com>