Add option to create merge request to create branch flow
### Problem to solve
Working in merge requests is often the preferred convention. We encourage users to create merge requests in a number of places including after a branch is created when changes are committed, as part of the Web IDE commit flow, and optionally when creating a breach from an issue (example screenshots below). We could be more proactive and provide the ability to create a merge request as part of the branch creation flow.
<details>
<summary>Examples</summary>
#### After branch/when changes are committed

#### Web IDE

### Creating a breach from an issu

</details>
### Proposed solution
Add the ability to create a merge request as part of the branch creation flow. An optimal hybrib form might be the ideal experience, but a MVC approach could be to include an optional checkbox to launch the merge request creation form after the branch is created. This is is similar to the Web IDE flow.

issue