Some of the buttons are so small, it is a pain to precisely
aim for them with the mouse:
* Geoscape: Stop time, slower, faster
* Messagebox: Close-button
* Base: next/previous base
* Buy/Research/Production: +/- Buttons
* Aircraft: next/previous/call home
* Tutorial-selection: small font makes for narrow "button area"
This is really quite un-ergonomic...
The timestop-button on geoscape is the most important of these,
because you want to hit it fast.
I'm aware that there are some keyboard-bindings available,
but that shouldn't be an excuse to skip improvements...