This commit adds support for creating new status columns. When the user
is in the 'board edit' mode, they can press the 'c' key to create a new
column. When a new column is created it automatically assumes the last
position on the board. We will add support later on to allow the user to
re-arrange the columns on the board.
Part of apollo/pelican#22
- Change type cardModal to cardForm because it is a Form and not a
Modal.
- Text the card's details directly from the form items when the Save
button is pressed instead of updating fields in the cardForm value
every time a change is made to the input fields.
