Custom category icons, tooltips, and removed labels

[DoomTas3r]

Removes category labels and subcategories, and adds tooltips and custom icons. Loading the icons was not optimized

Based on the idea #131 (comment)

[manuq]

Hi @DoomTas3r . This is nice, thanks for working on it. I think we can come up with better icons for the different categories later. Would you like to cleanup your commits so we can metge? Basically squash the "Fixes" commits and come with a few reviewable commits. Please let me know if you need help with cleaning up.

[DoomTas3r]

I think I understand how squash works now. I will squash the commits in other pull requests

[cassidyjames]

On HiDPI (2× scaling) the icons look tiny; is there a way to make them scale with the UI?

[DoomTas3r]

@cassidyjames I changed the import files so that the icons scale with the editor. How do they look now?

[manuq]

@DoomTas3r this is looking very nice! By the way, I don't have an HiDPI display.

[cassidyjames]

UI-wise this looks and feels great to me. Nice work

I've confirmed the icons now scale correctly on HiDPI. I was going to point out that it looks like the category labels don't scale, but they don't in main, either…

I'll file a separate issue for that. :)

[manuq]

@DoomTas3r would you like to cleanup the PR? The second commit undo things done by the first one. For example I see icons added and then removed. So you should squash them into one and provide a descriptive commit message. Then we can start reviewing!

[manuq]

Below in the PR you do this for the button tooltip text:

_button.tooltip_text = tr(category.name.get_slice(" |", 0))

So I think it's better to do the same thing instead of introducing a new "icon" key in this constant. If you want to keep the SVG files lowercase, you can use to_lower()

[DoomTas3r]

@manuq Alright, it's all cleaned up!