Sync with mail box

Proposed solution

As with JSF UI, there should be a way to sync the imap folder with the email account.
To this end, it should be added a document action to imap folder. When pressed, it should sync all unread email to this folder.

Acceptance criteria

Given I have write permission on a Email Folder document
When I navigate to that document
Then I see a sync icon

Given I have write permission on a Email Folder and navigate to that document
When I press the sync icon
Then All the unread mails from my configured email are imported

Given I have read permission on a Email Folder document
When I navigate to that document
Then I do not see a sync icon