Extend support for 4k and other HiDpi displays
On Windows 10 with 4k monitor, parts of Tiled interface look too small for comfortable work. Mainly, the Icons are too small, but in some places fonts are hard to read as well (see screenshots).
The immediate solution would be use SVG icons which can scale better, but the ideal long-term solution (IMHO) would be to have a setting which would allow to scale the whole interface - that would be an immense help for people with weak vision since even properly scaled SVG icons (like the new Replace Tileset icon) are still might be too small for some for comfortable work.

This is also a problem on Linux. If I set the GNOME scale (in control-center) to 200%, the window becomes so big that it cuts-off out-bounds. Everytime I open Tiled, I have to set it to 150% to see what I'm doing and be able to pan/scroll
@Rudxain Can you show a screenshot of that? I haven't heard of this problem before, and it sounds different from the issue on Windows reported above.
I'm sorry for the delay, I didn't have my laptop at the time. I tried opening it now, and the window seems "fine" even on 200%, so it's non-deterministic. I could describe the issue with more detail: when it happens, it's only the lower part that overflows, the sides and top are visible and interactable