added ref level offset control for each trace, fixed attenuation text always showing bug
Merge branch 'ref_control'
added capture_time_domain function to capture device
removed ref level offset textbox
Merge remote-tracking branch 'wardi/master'
merged with new master
added ref/min level controls
added const/iq plots to gui
added safeguard triggers outside selected frequency
fixed initial stop frequency text showing start frequency
fixed a few marker bugs
fixed marker appearing on correct trace bug
fixed marker switch bug