fix #21838 fix #21910
Add loop playback feature
Fix 21190 - misplaced ledger lines for whole notes

Fixed by computing a stem x-position in Chord::layoutPitched() which corresponds to the actual chord note widths and positions, rather than relying on a global, fixed value (score()->noteHeadWidth() ).
initial hooks
implementation of next/prev track

move up and down by track, stopping only at tracks that have content at
or before the cursor position within the current measure
Improved by scanning all chord notes and factoring some common computations.
Merge branch 'Fix_21190_bis' into Fix_21190_whole_notes_ledger_lines

Conflicts:
	libmscore/chord.cpp
change alt-up/down to move by chord and track

First move through current chord on current track, then move up and down
by track.
Merge pull request #428 from mgavioli/Fix_21190_whole_notes_ledger_lines

Fix 21190 - misplaced ledger lines for whole notes
move empty inspector hint into tooltip
Framework for bagpipe palette
Initial implementation bagpipe palette
Initial implementation bagpipe palette
fix #22121
Inspector for generic element: make ranges for X and Y offsets wider.

For instance, while placing a text element within a full page frame, the current ranges are too strict, as for instance Y offset is limited to 10 sp max.
Merge pull request #431 from mgavioli/Inspector_element_wider_xy_offset_ranges

Inspector for generic element: make ranges for X and Y offsets wider.
fix for slurs and voices in MusicXML import
fix #18345: Disable copy paste between different versions of MuseScore
Image inspector has some issues:

*) When autoscale is turned on, size and scale values are not updated neither are disabled
*) Lock aspect ratio does not work
*) mm/sp size check box does not update size values not size units of measure

Fixed by:

1) Sync-ing the enum at the beginning of 	inspectorimage.cpp with iList items
2) Adding a few extra calls to InspectorBase::valueChanged() for commands which change two values at the same time
Merge pull request #433 from mgavioli/Fix_inspector_for_images

Fix inspector for images