Add a threshold property for all channels. A combo box for Gain20 property.

src/controllers/stereo_daq/DAQConfigController.cpp

src/controllers/stereo_daq/DAQConfigController.h

src/controllers/stereo_daq/DAQParamController.cpp

src/controllers/stereo_daq/DAQParamController.h

.../stereo_daq/gui/daqconfig/daqconfig_controller.properties

...ereo_daq/gui/daqconfig/daqconfig_controllerProperties.xml

...ers/stereo_daq/gui/daqconfig/daqconfig_controllerView.xml

...rs/stereo_daq/gui/daqparam/daqparam_controller.properties

...tereo_daq/gui/daqparam/daqparam_controllerCommandView.xml

...stereo_daq/gui/daqparam/daqparam_controllerProperties.xml

...llers/stereo_daq/gui/daqparam/daqparam_controllerView.xml

...tereo_daq/gui/ledparam/ledparam_controllerCommandView.xml