Previously we already switch to loading the bootstrap file only from the
local file (ec42553910).
This removes the remaining parts of loading the bootstrap file from a
remote location.
This also updates the UI in case of parsing errors of the bootstrap.json.
* crash: A crash occurred in C:\jenkins\workspace\swift_wip_fsd_and_afv_client\build\out\release\bin\testcontext.exe.
* ASSERT in const QList<QAudioDeviceInfo> allQtDevices2 = QAudioDeviceInfo::availableDevices(QAudio::AudioInput)
* figured out it fails in a Qt console app, runs in a widget app
* see https://discordapp.com/channels/539048679160676382/623947987822837779/631939335255752704
This is an intermediate step to have smaller unit tests. It is a trade off
between having many many test executables compared to a few bigger ones. But
this comes a lot closer to what QtTest is meant to be used.
