Aaronia RTSA Rx support

New sample source plugin to support reception with the Aaronia RTSA (Real Time Spectrum Analyzer) and the Aaronia RTSA Suite software. This is mainly targeted at the Spectran V6 series however it just interfaces with a HTTP server block fed by a IQ demodulator block in the RTSA Suite so any flowgraph supporting this architecture would work. Details are provided in the readme.

Other changes and fixes

• Channel analyzer: engage rational down sampler also when no channel decimation takes place. Fixes #1622
• Display rotator on Star Tracker and Satellite Tracker polar charts for #1641. PR #1650 from @srcejon
• AFC and Demod Analyzer: fixed message queue disconnect. Fixes #1634
• Fixed ValueDial value settings when it is equal to previous value
• DATV demod: GUI: set RF bandwidth with standard SR
• Airspy: corrected transverter frequency and mode setting from GUI

Binary artifacts

For more details on artifacts and their contents please read the quick start in the Wiki.
Note that Ubuntu .deb package is for 22.04. Please note that SSE 4.2 is required.