(chore): channel sidebar buttons UI adjustments

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changed milestone to %sprint: Interesting Iguana

assigned to @omadrid

added Priority2 - Medium label

added StatusInProgress label

mentioned in issue #1432 (closed)

!437 (merged)

added StatusReview label and removed StatusInProgress label

added StatusInProgress label and removed StatusReview label

added StatusReview label and removed StatusInProgress label

mentioned in merge request !449 (merged)

closed via merge request !449 (merged)

mentioned in commit ae736311

unassigned @omadrid