properly re-enable controls when playback stops
Merge remote-tracking branch 'pyrf/master' into start_stop_flabels

Conflicts:
	pyrf/gui/plot_widget.py
remove tickStrings customization
re-enable mode drop-down too
set correct mode in dropdown
Merge pull request #70 from wardi/fix-control-reenable

properly re-enable controls when playback stops
Merge remote-tracking branch 'remotes/pyrf/master' into persistence_plot

Conflicts:
	pyrf/gui/plot_widget.py