integrations: Don't fix height of integration icon in detailed view.
integrations: Don't fix height of integration icon in detailed view.

This allows us to have more characters that we can use for the
integration name without overflowing the fixed height.

zulip/zulip,andersk/zulip,kou/zulip,andersk/zulip,zulip/zulip,kou/zulip,kou/zulip,zulip/zulip,rht/zulip,rht/zulip,zulip/zulip,kou/zulip,rht/zulip,andersk/zulip,zulip/zulip,rht/zulip,zulip/zulip,andersk/zulip,zulip/zulip,rht/zulip,andersk/zulip,rht/zulip,kou/zulip,rht/zulip,andersk/zulip,kou/zulip,andersk/zulip,kou/zulip