Fix #19472

Implements [Left] / [Right] not only from notes/chord-rests but from any element whose parent is a note, a chord-rest or a segment
For elements attached to segments, move to the chord/rest in element track, if it exists
Stops continuous reformatting of float data entered in inspector widgets
Stops continuous reformatting of float data entered in EditTools widgets.
Corrects vertical alignment for stemless notes (semibreves and breves).
First commit too simplistic and didn't work for ledger lines.

Error was in determining stem X pos. Improved.
Merge pull request #181 from mgavioli/Fix_#19455_entering_floats_in_inspector

#19455 - Entering float numbers in inspector
Merge pull request #183 from mgavioli/Fix_#19455_entering_floats_in_editttols

#19455 Entering float numbers in EditTools
Merge pull request #184 from mgavioli/Fix_#19809_semibreve_and_breve_vert_misalignment

Fix #19809 Semibreve and breve vertical misalignment
Merge pull request #156 from mgavioli/Fix_#19472

Fix #19472: [Left]/[Right] from more element types