fix #25765 : Fix crash when clicking bar time

setScore() was overridden to an empty function
so the score was never set. Now using the setScore()
inherited from MuseScoreView
Open strings in StringData.

Allows to mark strings as open (non-fretted).
Defaults to fretted, keeping backward-compatibility with existing scores.
Adds an attribute `open="1"` in score (and instruments.xml) string data (defaults to "0").

Benefits:
- allows future support (also in TAB's) for string instruments with non-fretted strings (mainly but, I think, not only the lute family)
- gives correct fretting for non-fretted strings
- instrument range can more easily and automatically linked to actual string tuning
- as this will be eventually needed for better TAB support, the score reading/writing will be already able to manage it.
fix #29841: Exported instrument changes sounds well
Merge pull request #1133 from mgavioli/Open_strings

Open strings in StringData.
fix loading of shortcuts.xml, typo, non existing actions
fix #29406: grace note navigation
fix #29756
update resource manager to download instruments_*.qm too
add button to update translations in preferences
Merge pull request #1154 from MarcSabatella/29406-grace-navigate-2

fix #29406: grace note navigation
Merge pull request #1155 from BartlomiejLewandowski/29756-tablature-selection-fix

Tablature selection fix
The screen-reader will now also tell the menu's default shorcut keys,
when it is selected.

For example instead of "File" it will now say "File Alt+F".
fix #29901: cursor left in note input mode
Merge pull request #1157 from MarcSabatella/29901-left-cursor

fix #29901: cursor left in note input mode
Merge pull request #1156 from andreituicu/accessible-menus

Accessible Menus
fix #23030 : Missing action buttons in TextEditor

Is now able to cancel editing. And closing TextEditor
with X clears any modifications, which is most intuitive.
fix #29886
Merge pull request #1159 from Soerboe/23030_Missing.action.buttons.on.TextEditor

fix #23030 : Missing action buttons in TextEditor
Merge pull request #1151 from Igevorse/instrument-change

fix #29841: Exported instrument changes sound well
fix #29736