since 'to' be now be templated a user can configure a message to send to the subreddit the action is being processed from using `to: 'r/{{item.subreddit}}'`
* Create self/link submissions, no reddit media (upload) yet
* Submission can use user modifiers (nsfw, spoiler) and mod modifiers (sticky, distinguish, lock)
* Can create submission in current subreddit (default) or arbitrary subreddit defined in configuration (targets)
* Can create multiple submissions by defining multiple targets
* Cache subreddit removal reasons and display in popup helper in authenticated config editor
* Add fields for removal reason note/reason in remove action
* Update remove action documentation to include new fields
