In combination with ifdef'ed-out blocks, the collapse block
indicator was sometimes painted with the ifdef'ed out color.

In combination with ifdef'ed out blocks (un)collapse all would
possibly never expand the blocks again.

Reviewed-By: con

And skip building before running for them.

Conflicts:
	src/plugins/cpptools/cppfindreferences.cpp
	src/plugins/cpptools/cpptoolsplugin.cpp
	src/plugins/texteditor/basefilefind.cpp

Acked-by: hjk <qtc-commiter@nokia.com>

(cherry picked from commit e187cb40)

(cherry picked from commit 53026537)

Reviewed-by: con

The changes enables the auto-parentheses magic of normal
backspace also for the DeleteStartOfWord case.

Do not close a trk device from its read handler, wire messages
correctly. TrkDevice: Terminate threads before closing.

Ensure the user can stop a semantic search and added a method to get a pointer to the ModelManagerInterface.