- as discussed with Design, do not allow the user to select the UI scale
option from Settings as it causes many problems; instead rely on the
OS/Qt HighDPI support to handle the scaling for us
- note however, for advanced users, it's still possible to specify the
UI scale manually by exporting the standard `QT_SCALE_FACTOR` prior to
starting the app
- in the longterm, we will come with our own scaling solution at the QML
level, independent from the OS
Fixes#14137
8b8af40979