Update seq.cpp

Fixing bug #23667. Tempo of Count In now reflects change in tempo slider in play panel.
Merge pull request #764 from shredpub/master

Update seq.cpp. Fix #23667
fix for text color
fix lineproperties dialog
fix #23038: make tooltip translatable

and also generate the list of meta tags on the fly and from the current
score. Show their current values too.