Sidebar responsive width optimizations

[holtwick]

On full desktop the container width is 1200px, but the extended sidebar on the left-hand side collapses much earlier than reaching this window width (marked as "1" in the screenshot). I would prefer it to stay wide until window with 1200px is reached.

This current behavior has negative effects for example on smaller macOS screens where the Dock is placed at one side instead at the bottom of the screen.

I'd also suggest to instead collapse the version info on the bottom right, since it is less significant (marked as "2" in the screenshot).