- 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
Before the user had to choose between committing to a new branch,
committing to a new branch AND creating an MR, or committing to the
current branch regardless of whether or not it already has an MR.
This commit separates the creation of an MR from whether or not they
commit to an existing or new branch
