Issues with HiDPI displays on Windows

Issues:
1) Text on "Welcome" page is unreadably small.
2) Default font size of help is also tiny.
3) Text in some line-edits and on may panels is cropped vertically.
4) Tiny icons.
5) Default size of settings dialog is so small, that controls get collapsed.
6) Sizes of debug-mode panels are small, too, by default.
etc.

Most of the screenshots attached were taken from maximized Creator window.
Smaller ones were taken from default windows sizes.