Make all sidebar horizontal rules even

[travisk-codes]

The horizontal rules were inconsistent before (two would go all the way to the edge while the other did not). This PR gives all horizontal rules an even gap to the right.

Before:

After:

[veksen]

This was by design, I'll think about this one

Currently I don't like the menu hierarchy at all, and thinking of scrapping most of it. The full lines were meant to be definitive "cuts", while cut lines were meant to be a split of that specific section.