Prevent timeout exit when --no-timeout is used

Submitted https://github.com/tias/xinput_calibrator/pull/45

Signed-off-by: Jeff Lasslett <jeff.lasslett@gmail.com>
show the name of the device on screen

* this is intended for a better handling of multiple devices
* while being here the common settings for both GUIs are shared

Signed-off-by: Andreas Müller <schnitzeltony@googlemail.com>
Merge pull request #49 from schnitzeltony/gui-enhancements

Gui enhancements