[outline] Hover should not use XtextDocument#priorityReadOnly
https://bugs.eclipse.org/bugs/show_bug.cgi?id=450433
[editor] Copy Qualified Name doesn't work in some cases #450356
https://bugs.eclipse.org/bugs/show_bug.cgi?id=450356

Change-Id: Ia8aad02f8909f72d5d5a986202b74a30ed94b5f5
[editor] No semantic highlighting applied on open
https://bugs.eclipse.org/bugs/show_bug.cgi?id=450426

Change-Id: I96e639414aeac43de88c101fa26433ac29247df9
Merge "[editor] Copy Qualified Name doesn't work in some cases #450356 https://bugs.eclipse.org/bugs/show_bug.cgi?id=450356" into v2.7_Maintenance
Merge "[editor] No semantic highlighting applied on open https://bugs.eclipse.org/bugs/show_bug.cgi?id=450426" into v2.7_Maintenance