New branch dialog: Pressing enter should activate the ok action

[jecisc]

When creating a new branch I often use the view to create a new branch by name and each time I end up wanting to press enter to validate but it does not validate the dialog. I think it should be done to improve the UX.

@AlexisCnockaert I'm not sure what is the best solution for this but maybe you can ask to Esteban?

[AlexisCnockaert]

@estebanlm I was thinking to use the whenSubmitDo: method because other presenters already use this to trigger the ok action when pressing enter, what do you think ?