Fixes https://github.com/vector-im/riot-web/issues/10554
Issues fixed:
* Fields were not ~30px from the avatar (too much right margin)
* Tooltips overflowed the dialog on some resolutions
* SetIdServer didn't have an error state for making the field red
* Spacing between sections in Discovery was wrong (fixed by just removing the problematic n+2 selector - it didn't help anything)
and make that width narrower so we can fit a tooltip in the left
hand side (they were a little too wide anyway for the kind of data
being entered, even on a narrow window).
These icons are based on Feather as the original source, but they have various
tweaks applied, such as stroke width, color, etc. Hopefully the tweaked name
makes this more obvious in the future.
