BaseTextEditWidget: Forward everything with ControlModifier to QPTE

Task-number: QTCREATORBUG-11137
Change-Id: Icd1bd55cb8bb3087667b01e18b6774987971601b
Reviewed-by: Eike Ziller <eike.ziller@digia.com>
Debugger: Make demangler autotest data-driven

Change-Id: Ieb0cd7ac4a985503d84a64eb4d1718c93d2b5d70
Reviewed-by: hjk <hjk121@nokiamail.com>