web: improve label presentation #1440

i think we should change how the labels are shown in the issue feed. as-is, i'm of the opinion that they crowd the issue subjects too much.

some raw, early, unformed ideas:

• hide all labels behind an icon and show them on hover
• put them on the same row as the author information, and:
  • make them smaller, or
  • hide them behind an icon (left side, maybe?)