Adjust trasnparent class of challenge buttons. Closes #4346
Merge pull request #4348 from crookedneighbor/fix-transparent-challenge-buttons

Adjust transparent class of challenge buttons.
closes #4353. If time on chat would break onto new line, just puts whole
time statment on new line
fix(webhooks): don't send webhooks if not valid url (also if not
enabled), fixes #4357
Adjusted margin for markdown list in tast-text. Closes #2721