- Pull the new MR option out into it's own component
- Default MR checkbox to true when creating a new MR and committing to a
  branch that does not have an MR
- Still change the MR checkbox to false when a user is on a branch that
  already has an MR
- Hide MR option when on a branch that already has an MR and committing
  to current branch
- Don't default to true when committing directly to master