Related #576 High/Low DPI Adapting

The Qt UI would change the size according to the logical DPI of the computer
Only Windows and Linux have been tested. (Should also work on Mac but have not tested).
The function is unfinished.
Can be on the same line as `except:`

BTW, it's generally a bad practice to catch all exceptions, which is why I used `except AttributeError:` in my example.