now the file CommandWindow is clean (or supposed to be), the loading/saving settings features both work. We can remove or add a line of comboboxes, if we select an instrument other than "TIME" on the last combobox, a new line appears, if we select "TIME" on the combobox before the last one, the last line is deleted.

If datataker is running, the user cannot "Connect" an instrument list that has more (or less) instruments than the list in datataker. This couldbe done when datataker is stopped. This way there is no way one can disconnect an instrument while measuring its value.
Merge branch 'sliders' into SuperInterferometer

Conflicts:
	recordsweep/CommandWindow.py
	recordsweep/G2Gui.py