fixed gui miscalling the sweep state
removed redundant code from the plotState
fixed marker units
RFE_MODE is now set in pyqtgraph example
pyqtgraph example now handles all rfe modes
BANDWIDTH is now retrieved from the WSA class properties based on RFE_MODE
pressing return when text box is selected now connects to device
title now includes IP of box connected
Merge branch 'bug_fixes'
cleaned up plot state
renamed reference_level label
Merge commit '6a7943c71c0bbd5e426005ea9e5cc43f4c85d602'
fixed hotkeys
removed 20dB attenuation addition to power spectrum

Conflicts:
	pyrf/gui/dsp_widget.py
	pyrf/gui/gui.py
enabled level trigger controls
fixed triggers not always applying settings when no data is being received