Set the tightbbox for unparsed chords.

... to ensure that they get spaced correctly.
fixing 2 mistakes in instruments.xml

and instr_language.xml
fix #20970 : Glissando collides with elements before note
Merge pull request #357 from Soerboe/fix20970_glissando-acciendental

fix #20970 : Glissando collides with elements before note
Merge pull request #356 from Jojo-Schmitz/instruments.xml

fixing 2 mistakes in instruments.xml
Merge pull request #349 from softins/layout-unparsed-chords

Set the tightbbox for unparsed chords.
gray out inactive icons
colorize toggled icons
try something new for breaks design
fix crash in text indent more, ordered list
add simple system bracket