appview: add `issue_reopen` event
both issue close and reopen are handled by `NewIssueState` handler.
this works because passed `issue` obj is already holding the newest
issue state.
Signed-off-by: Seongmin Lee <git@boltless.me>
authored by
boltless.me
and committed by
Tangled
cf80a3b9
b8106260