fix #24639: populate f2 palette with common symbols
Fix accessible info for key signature.
	modified:   libmscore/keysig.cpp
update IntervalTree
Merge pull request #1168 from andreituicu/score_accessibility

Fix accessible info for key signature.
Merge pull request #1167 from MarcSabatella/24639-f2-palette-2

fix #24639: populate f2 palette with common symbols
add accessible plugin to Windows installation