GuildAndFriendRemovalAlerts: Check for removals immediately on startup

[Yentis]

If a guild or friend removes you while you were offline, the plugin will not notify you until one of the dispatcher events is called. With this change it will check immediately on plugin start.

[Strencher]

Don't forget to update the bundle too.

[Metalloriff]

Thank you for your contribution (I'm totally in time, this will definitely still work a year later)