Channel Analyzer fix
There is a bug in the recent releases that prevent the samples to be fed to the scope. This should be fixed now. Fixes issue #547
Various enhancements
- Spectrum GUI: use spin boxes for spectrum range. Implements issue #546. Changes substantially how these controls have been working for ages but brings finer tune and direct input.
- Added SWSCALE to the list of required FFMpeg modules. Implements issue #437
- Fixed Soapy SDR find module. Implements issue #519