Draft moving is inconsistent

[armhub]

We generally do not allow drafts to be moved between folders. However:

• It is currently still possible to drag draft to another folder
• There's no button to restore the draft from trash

Test notes

• [ ] Select a single, normal email
  • [ ] (Desktop/Web) Verify that nothing happens when this email is dragged into the Drafts folder.
  • [ ] (Desktop/Web) Press V. Verify Drafts is not listed.
  • [ ] Click the move button. Verify Drafts is not listed.
• [ ] Select multiple normal emails
  • [ ] (Desktop/Web) Verify that nothing happens when these emails are dragged into the Drafts folder.
  • [ ] (Desktop/Web) Press V. Verify Drafts is not listed.
  • [ ] Click the move button. Verify Drafts is not listed.
• [ ] Select a draft in the drafts folder
  • [ ] (Desktop/Web) Verify that nothing happens when these email is dragged into a folder that is not Trash.
  • [ ] (Desktop/Web) Press V. Verify that only Trash is listed.
  • [ ] Click the move button. Verify that only Trash is listed.
• [ ] Select a draft in the trash.
  • [ ] (Desktop/Web) Verify that nothing happens when this email is dragged into a folder that is not Drafts.
  • [ ] (Desktop/Web) Press V. Verify that only Drafts is listed.
  • [ ] Click the move button. Verify that only Drafts is listed.
• [ ] Select multiple drafts in the trash.
  • [ ] (Desktop/Web) Verify that nothing happens when these emails is dragged into a folder that is not Drafts.
  • [ ] (Desktop/Web) Press V. Verify that only Drafts is listed.
  • [ ] Click the move button. Verify that only Drafts is listed.
  • [ ] Verify that these nothing happens when these emails are dragged into a folder that isn't Drafts.
• [ ] From the trash, select an email that is a draft and one that is not.
  • [ ] (Desktop/Web) Verify dragging these emails does not work.
  • [ ] (Desktop/Web) Press V. Verify that nothing happens.
  • [ ] Verify there is no move button.
• [ ] On mobile (or with developer tools emulating mobile):
  • [ ] Verifying that swiping left on a draft in Drafts does nothing (besides deselecting).
  • [ ] Verifying that swiping left on a draft in the Trash recovers it into the Drafts folder.
  • [ ] Verifying that swiping left on a normal email in the Trash recovers it into the Inbox folder.
• [ ] On a Premium account, in User settings -> Emails, try to create an inbox rule and verify that Drafts is not listed in the dialog as a potential target folder.