Preliminary checks

• I've checked that there aren't other open issues on the same topic.

Describe the problem requiring a solution

As a new player I just stumbled upon the hotkey options and when I scrolled down I saw some hotkeys that lit my eyes: W for Well, Z for "put hero to sleep", 1 for "dwelling level 1". They are so useful!
But why do I need to scroll down so much to find them? I'm sure a lot of players just refrained from going over all of them just to find the useful ones, and missed out on them.
Why is the hotkey screen just a long list?

Describe the possible solution

Add category buttons below the "Hot Keys" options menu.
Right now I thought of 5 categories:

1. Menu hotkeys
2. Adventure hotkeys
3. Combat hotkeys
4. Town hotkeys
5. Map Editor hotkeys

as being shown in this simple mockup:

And yes, obviously some hotkeys will be relevant to some of those categories at once, but it's fine.

I think this will make the really cool and innovative hotkeys menu much more accessible and comfortable, especially for newcomers.