condense: Add missing stopPropagation/preventDefault.
condense: Add missing stopPropagation/preventDefault.

This fixes an issue where an open compose box would close when
clicking to expand a condensed message.

Fixes #15808.

andersk/zulip,showell/zulip,brainwane/zulip,kou/zulip,rht/zulip,showell/zulip,eeshangarg/zulip,punchagan/zulip,kou/zulip,punchagan/zulip,andersk/zulip,zulip/zulip,rht/zulip,rht/zulip,zulip/zulip,brainwane/zulip,punchagan/zulip,punchagan/zulip,hackerkid/zulip,brainwane/zulip,zulip/zulip,eeshangarg/zulip,eeshangarg/zulip,punchagan/zulip,hackerkid/zulip,eeshangarg/zulip,showell/zulip,zulip/zulip,andersk/zulip,brainwane/zulip,rht/zulip,kou/zulip,hackerkid/zulip,showell/zulip,showell/zulip,eeshangarg/zulip,rht/zulip,rht/zulip,andersk/zulip,zulip/zulip,kou/zulip,brainwane/zulip,kou/zulip,kou/zulip,zulip/zulip,punchagan/zulip,eeshangarg/zulip,andersk/zulip,hackerkid/zulip,eeshangarg/zulip,hackerkid/zulip,andersk/zulip,andersk/zulip,zulip/zulip,brainwane/zulip,brainwane/zulip,rht/zulip,kou/zulip,showell/zulip,hackerkid/zulip,punchagan/zulip,showell/zulip,hackerkid/zulip