Feature/fix: Zoom at cursor! Zoom now zooms about cursor. 


git-svn-id: https://lmuse.svn.sourceforge.net/svnroot/lmuse/trunk@1689 21394207-e112-0410-bd00-e4265ec52c78
Feature: Shortcuts dialog modeless + has default global shortcut Ctl+Shift+F1 + "Printable file" button. 
Memory leaks! Many widgets and dialogs had no parent and were not deleted! See ChangeLog.  


git-svn-id: https://lmuse.svn.sourceforge.net/svnroot/lmuse/trunk@1690 21394207-e112-0410-bd00-e4265ec52c78
added setting for default track height

git-svn-id: https://lmuse.svn.sourceforge.net/svnroot/lmuse/trunk@1691 21394207-e112-0410-bd00-e4265ec52c78
missing file

git-svn-id: https://lmuse.svn.sourceforge.net/svnroot/lmuse/trunk@1692 21394207-e112-0410-bd00-e4265ec52c78
release 2.1.1

git-svn-id: https://lmuse.svn.sourceforge.net/svnroot/lmuse/trunk@1693 21394207-e112-0410-bd00-e4265ec52c78