Add options page with overrideable device. Correct
wiring of the rfcomm process.

move the start mode variable to DebuggerStartParameters

By only providing a qtInstallDir variant

This splits up the edit and active settings. Let people try it and
report usability problems. I'm not 100% convinced of the layout either.

Cause that's the relevant context.

Based on a change by Denis Dzyubenko, done with mae.

remove DebuggerRunControl from DebuggerManager
use typedef for QSharedPointer<DebuggerStartParameters>

merge DebuggerRunControl::m_dumperLibrary{,Location} into StartParameters

has changes to make these files compile in Creator when Qt is compiled
in a namespace.