#24943 fix lost pich when load mmRest
Fix tab order of Inspector dlgs.

Many (sub-)dlgs making up the Inspector have a seemingly random tab order. To improve navigation via keyboard, the tab oder of all dlgs has been corrected to the visual order of controls.

Care has been taken not to alter the dlg sizes.
fix #21205: don't show page number on first page

unless $P gets used instead of the default of $p, just like the default
setting for 1.x scores.
Also add $c and $C for copyright, with $c being a shortcut for
$:copyright: and $C showing it on first page only.
1.x compatibility for page number on first page
Move updated macro usage hint into a tooltip

generated in cpp rather than in the ui files.
fix 24491: odd should win over even

when not using the Odd/Even setting, so that every page looks like page
1 looks with the Odd/Even setting
fix 24491: disable even dialog part

when not using the Odd/Even setting
add pdf renderings of testfiles
Fix #23059: Accented notes in guitar pro files now displayed.
Fix #23060: Added support for heavily accented notes in the GP5 format
Fix #23055: Support for tremolos in GP4 and GP5 file formats
Fix #23057: Trills in GP4 and GP5 files are now displayed.