move DSP menu creation to MainWindow
define dsp menu with a list
developer options menu
make dsp_options private
move SpecAState to its own module
prevent sending mode before device is connected
put speca (sweep) modes in device properties
remove left band sweep until we support it with compute_usable_bins
show mode from recording
attenuated edges developer option for playback
attenuated edges dev opt for single captures
spelling
Revert "disabled alternating colors in sweep mode"

This reverts commit 2e7f83abf9a7a21fdcc0240b648fded3878cfe08.

Conflicts:

	pyrf/gui/gui_config.py
show_sweep_steps developer option