Settings improvements

[thanasipantazides]

Improvements for Settings functionality

• [x] Add a backend container class for all settings (SystemConfiguration or something?). Maybe divide into flight/nonflight.
• [x] Populate SettingsDialog with a default settings.json file.
  • [ ] File choice should persist between application open/close.
• [ ] Add filters to FilePathLoad QFileDialogs.
• [ ] Handle manipulation of settings by writing to some settings.json. The selected settings.json file should be used again after closing and opening the application.
• [ ] FormatterUDPInterface should ingest SystemConfiguration (or whatever it's called) and use to try opening sockets using the configured address/port.
• [x] Need callbacks for each changed setting. I.e. retry socket open, file open, etc and report status. Maybe highlight setting fields red if setting does not take.
• [ ] Maybe make a DetectorBackend class that wraps FormatterUDPInterface and SystemConfiguration (and possibly others)? Then pass it to all Detector...View objects.

[thanasipantazides]

Need to be careful that SystemConfiguration is init'ed only once, then passed as reference to all others. Maybe need to structure application startup process.

[thanasipantazides]

Control flows like this:

flowchart TD

QMainWindow -- inits --> DetectorGridDisplay
QMainWindow -- inits --> FormatterInterface
QMainWindow -- inits --> SystemConfiguration
DetectorGridDisplay -- inits --> DetectorBackend
SystemConfiguration -- arg --> DetectorBackend
FormatterInterface -- arg --> DetectorBackend
SystemConfiguration -- arg --> SettingsPanel
SettingsPanel -- inits --> SettingsDialog
SettingsDialog -- modifies --> SystemConfiguration
DetectorBackend -- arg --> DetectorView