This includes "optimizations" for almost all publish warnings; the aspect ratio
warning is not fixed because trying to fix that has wider repercussions for
scene/source layout/positioning and potentially even required bitrate
A possible future "optimization" to fix the aspect ratio warning would be to
compute a number of possible choices based on the current downscale setting with
a target output resolution of 480p/540p/720p/etc. and let the user select one of
the resulting base resolutions
Currently only handles the vanilla OBS case of two possible codecs, i.e.
it won't list multiple listed supported codecs as alternatives in the
warning message; also doesn't verify that the listed codecs are actually
available in OBS
Other than that it supports multiple "supported audio codec" entries
in services.xconfig per service, in case anyone wants to white list
both MP3 and AAC for their service:
```
recommended : {
"supported audio codec" : "MP3"
"supported audio codec" : "AAC"
}
```
Properly hide the "Keep recording" checkbox when switching to file
output only, update the Start Streaming/Start Recording buttons when
switching modes in the settings.
Move the keep recording setting from global.ini to Broadcast Settings
(profile dependent), make it default to off, comment out the old
dashboard link code for now.
