Add grip to modify hairpin aperture
fix #7805 : copy and paste does not preserve stem direction for beamed notes
change semantic of tick2 for line spanners
add vtest for ottava
update Gonville
Merge pull request #740 from AntonioBL/beam_direction_paste

fix #7805 : copy and paste does not preserve stem direction for beamed notes
simplify TextLine, use only text and drop symbols
several fixes for translations
simplifying translation by joining multi part strings

Correcting some apparent errors and adding some missing translations in
the due course
'untranslate' some strings from the debugger
adding/removing colons in some dialogs

and making insert measure dialog similar to append measures dialog
a couple more colons added/removed from some dialogs
untranslate yet another string from debugger
fix warning due to duplicate name
Add proportional grip aperture positionning whane hairpin is small
Merge pull request #744 from Jojo-Schmitz/orig-texts

Some more fixes for translation
Merge pull request #722 from Gai-Luron/aperture-grip

Add grip to modify hairpin aperture
fix slur issue #24929
disable apparently unimplemented dialog
Fix slur error on mmRest