Room creation - form submission

We need to wrap the room creation form into a form element and use the ngSubmit event to trigger the room creation to enable the user submitting the form by pressing enter.

changed the description

added ToDo label

created branch 81-room-creation-form-submission

assigned to @lmas60

mentioned in merge request !67 (merged)

added ~1064 and removed ToDo labels

added 15m of time spent at 2018-03-09

mentioned in commit 7707ba70

closed via commit 47eeded4

closed via merge request !67 (merged)

mentioned in commit 47eeded4