Tree: Theme Issues

[simeonoff]

• The left and right paddings should be fixed to 16px, 12px and 8px for large, medium and small respectively.
• The indentation should be 24px for all display densities.
• Might be irrelevant, but in the UI kits we have a specific stylisation for the hyperlinks, which I believe isn't implemented. Same for the custom chevron, don't know what the situation is with that.
• Тhis is probably some bug, but when I hover the first item, it doesn't inherit the correct color for the foreground in both light and dark mode. In the rest of the items this problem isn't apparent.

Edit: There are two things, which need to be applied in Angular as well:

• When a node is selected, it inherits a wrong color (--foreground-active). It should be fixed to (--foreground)
• The indentation should be 24px for all display densities.

Originally posted by @imincheva in #1134 (comment)