Merge pull request #528 from mgavioli/Fix_23371_TAB_grace_chords_fretted_wrongly

Fix #23371 : TAB - grace chords fretted incorrectly
more strings cleanup
fix upper case of elementName in UI
more string cleanup
fix #23384: < character lost from stave text when loading file created in Musescore 1.3
Initial implementation of a Range element to display a tune range
Draw line from note centre to note centre
Add support for (editable) accidentals for top and bottom note heads.

Add "Update Range" button in Inspector.