Default window size in Ubuntu 200% (HiDPI) mode is wrong

[jonasschnelli]

Starting Bitcoin-Qt on Ubuntu 20.04.01 with display scale of 200% results in a extremely tiny main window.

[maflcko]

Can reproduce on Fedora as well

[hebasto]

@jonasschnelli @MarcoFalke Mind testing #107 ?

[Bosch-0]

200% (HiDPI) on Windows also has issues on master 9af7c19. Will test #107

[hebasto]

@Bosch-0

200% (HiDPI) on Windows also has issues on master 9af7c19.

It is a different problem which deserves its own issue.