events: Disable topic edit & msg edit/delete for web public guest.
events: Disable topic edit & msg edit/delete for web public guest.

To ensure web public guests cannot change any data, it's natural
that we disable topic & msg edit / delete ops.

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