Reviewed-by: hjk
Reviewed-by: Christian Kandeler <christian.kandeler@nokia.com>

Could not be tested with actual QML project yet.

Reviewed-by: kh1

Also document remote gdbserver adapter's signal.

The device configuration widget is now the only place the user
ever has to specify ports.

Necessary for debugging with a remote gdb (as opposed to gdbserver).

Reviewed-by: kh1

This makes us more independent of the developer PC's firewall setting.

Reviewed-by: kh1

1) Make sources available on device.
2) Enable users to switch between gdb and gdbserver approach (users may not be able to use the former if they have no control over their firewall).

Reviewed-by: kh1

Use Debugger::DebuggerRunControl directly instead of wrapping it
into another RunControl.

Reviewed-by: hjk