Improvement idea: Windows high DPI support (and a workaround)

[waded]

It'd be if Tasmotizer on Windows (I tested release binary 1.2) support high DPI displays. On a 3000x2000 13.3" display I find its user interface uncomfortably small to read & click - nearly all apps I use on this laptop respect the default 200% scaling factor, but as Tasmotizer's currently built it's about half the size I expect.

As a workaround, specifying the Qt parameter that forces DPI-unaware rescaling works: tasmotizer-1.2.exe -platform windows:dpiawareness=0. It perhaps would look better with DPI-aware rendering, but this is a good start, this is comfortable. Here's a picture of the two modes:

If I figure out a better change I'll submit a PR.