Multiradio Panel and forced squawk mode fix

This utility is the replacement for IOCModules from OpenCockpits.
Differences from original IOCModules:
1. At this moment support only Multiradio panel.
2. Doesn't force transponder to mode c (so can be used in vatsim/ivao)
3. Changes in standby freq immediately visible in FS.
4. ADF,XPDR display improvements - highlight freq edit position.

Please note you need to plug-in MultiRadio panel first, and then start the application.
No configuration settings available.