More feedback changes

- Added Cancel button, which clears all data from task creation and
reverts to DefaultPanel
- Changed back the text for the cards. So if there’s a long title in a
card, the beginning of the title is on the left, but it continues to
the right. (Somebody should do ellipsis … thing for this)
- Added console output for showDefaultPanel, showCreatePanel, and
showEditPanel
- Moved clearForm method from TaskCreateView to TaskEditView