Display user can vote state

[sklirg]

This renders a box with current user permissions. It will vary depending on permissions and voting state.

Close up:

Users who should be allowed to vote, but currently can not (canVote is false) gets a warning symbol:

If you are not allowed to vote at all, some irrelevant information is removed:

It also works for managers and admins:

[codecov]

Codecov Report

Merging #311 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #311   +/-   ##
=======================================
  Coverage   87.66%   87.66%           
=======================================
  Files          21       21           
  Lines         762      762           
=======================================
  Hits          668      668           
  Misses         94       94

Impacted Files	Coverage Δ
server/channels/connection.js	100% <ø> (ø)	⬆️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update fe77c9e...eba5a6c. Read the comment docs.