gui: Fix double click in chip select dialog

Signed-off-by: Michael Buesch <m@bues.ch>
gui: Add double-click support in programmer select dialog

Signed-off-by: Michael Buesch <m@bues.ch>
gui: Use new-style signal/slots

Signed-off-by: Michael Buesch <m@bues.ch>
gui: Fix raw command sending

Signed-off-by: Michael Buesch <m@bues.ch>