* Explicitly set signing mode to SelfSigned if not mentioned in the
   .user file
 * Do not use c-style casts.

There is still an open issue in this fix since the new extension might be of a different mime type (and our editors are attached to it currently).
More details documented in the code.

Task-number: QTCREATORBUG-2094
Reviewed-by: Thorbjorn Lindeijer

enabling scripts that completely generate the project directory.
Default to %TargetPath%.

Task-number: QTCREATORBUG-2279

... on clicking stack frames or disassembler/
memory views.

Introduce flags to openEditorAt, pass
EditorManager::NoModeSwitch where applicable.

Task-number: QTCREATORBUG-2278

Thanks to this patch we can move the filtering of C++ symbols
in a background thread.

Done-with: Erik Verbruggen

Note: The next commit fixes the wrong default filter
Task-Nr: QTCREATORBUG-2266

 * ... add a unit test.

work.

Task-number: QTCREATORBUG-2255

not found with the remote adapter

Task-Nr: QTCREATORBUG-2269

Switch to Edit Mode once we constructed it in Core::init(). Switch to a
the Welcome Mode in Core::extensionsInitialized. Also works

The function always switched to Edit Mode, which was the cause for
several bugs. Since openEditor() already does switch to the right mode,
the function is not really needed.

The following actions now respect the prefered mode of the editor:
"f file"-locator
The Open Documents list
Editor history navigation

It was missed by the remote adapter before.