Small changes here & there

Wikicons is apparently a conference name, lol.
UI refinements.

Tried to do but can’t:

Make topic box run across the screen on mobile view, but wasn’t able
to.

Reply text field to align with topic box

Participants & number of participants be #999

Reply (2) instead of Reply • 2 comments

Topic box’s timestamp is not the same with the rest, should be the same.

Let me know if I’ve done things better this time around!