Implement proper scaling of wallet app for high-DPI devices

[Leberer]

It would be great to have the app scale properly on high-DPI displays.
I'm using the Windows version of the wallet and it has the scaling issues like many other programs on these high-DPI displays.
Text strings are cut off, very small or displayed on top of each other.

[wrinkl3]

@Leberer Do you have the same problems with the Bitcoin Core?

[Leberer]

@wrinkl3 I have never run the Bitcoin Core client. I'll try it in the next few days.

[wrinkl3]

There might be a way to add high-DPI support via the Qt config, I'll look into it.

[Leberer]

@wrinkl3 So I tried Bitcoin Core. It also doesn't look pretty (small fonts etc)
But there everything at least was readable.
I only realized recently (after seeing a screenshot of a correctly displayed wallet) that there is a field missing in my "Send" tab. I never sent anything with the desktop wallet so far but I guess that's the most important problem.
Would be awesome if that could be improved!

EDIT
Sorry I just realized these fields only show when you activate coin control in the options. So not a problem!