fix #31576: get right clef & key when inserting measures
fix #21110 : Glissando text raised more above wavy line
fix #30801: no key change for drum staff
more fixes for plugin manager, load/unload plugins without restart
fix #31481: plugin files configured to be loaded don't get removed when the file is removed
Merge pull request #1255 from Soerboe/21110-text-collides-glissando

fix #21110 : Glissando text raised more above wavy line
fix #31756: Spinner and Palette arrow badly painted
fix crash on first load of pluginManager
fix potential crash when unregistering a plugin
remove unused include
Merge pull request #1257 from MarcSabatella/30801-drum-key

fix #30801: no key change for drum staff
Merge pull request #1248 from MarcSabatella/31576-insert-measure-key-clef

fix #31576: get right clef & key when inserting measures
change mscore.exe to MuseScore2.exe

to diffentiate better from a possible parallel installation of MuseScore
1.x. To build in QtCreator add "-DMSCORE_OUTPUT_NAME=MuseScore2" to the
cMake command line and ajdust the project to run MuseScore2.exe (rather
than mscore.exe).