update mtest
fix #29176: Changed wrong select ares to selectall
Merge pull request #1109 from folbo/29176-faultykeysig

fix #29176: Changed wrong select areas to selectall
fix some texts
remove instruments_de.xml

not needed anymore, as it is translated competly on Transifex
remove instruments1.xml

it doesn't seem to serve any useful purpose
Fix #29286
Prevent crash on loading scores with more than just the default layer in
them.
fix #29151: tie positioning in chords
Fix #29146 - Ineffective checkboxes in standard staff type props

Some `connect()` were missing.
fix #25852 Fixed assigning the end of a range selection
Fixed range ending for lasso select.
fix #29311 Fixed single selection to range selection transition.
Merge pull request #933 from BartlomiejLewandowski/25852-range-timesig

Range selection ending fix
Merge pull request #1111 from MarkRS-UK/LayerTagCorrection

Loading scores with layers
Merge pull request #1114 from BartlomiejLewandowski/29311-selection-extend

Fixed single selection to range selection transition.
use nextSegmentAfterCR instead of next1MM
Merge pull request #1113 from mgavioli/Fix_29146_Ineffective_checkboxes_in_stafftype_props

Fix #29146 - Ineffective checkboxes in standard staff type props
make edit staff type ui a bit less ugly
Merge pull request #1112 from MarcSabatella/29151-crowded-ties

fix #29151: tie positioning in chords
Merge pull request #1110 from Jojo-Schmitz/translation

(pre)Translation fixes