Fix notifications popup wrapping

Here's my proposed fix in two commits:

• 1fbd4b4b: Simply make the labels a bit wider, and add an opinionated ellipsize: end so that worst case scenario it is the "kb/s" that gets hidden.
• 221fb10b: This is a nitpick to make sure that numbers are "tabular" meaning that they don't jump around (think "11" vs "44" in a non-monoscape font).

The second one is bonus points to make the popup even prettier 👀

Here's a video of how it looks: builder