Fix permissions when sending to DMs or groups
Fix permissions when sending to DMs or groups

When performing an action on a DM Channel or Group, an arbitrary
permission check would always fail, causing the action to error out with
a lacking permissions error.

To fix this, just assume the action will always succeed.
Roughsketch/serenity,zeyla/serenity.rs,Lakelezz/serenity,eLunate/serenity,Flat/serenity,zeyla/serenity,acdenisSK/serenity