TaskListCard.fxml: tweak height of card
TaskListCard.fxml: tweak height of card

With the address, email and phone fields of a task removed, there is no
need for the task list card to be so tall. Save some vertical space by
decreasing its vertical height.

CS2103AUG2016-T11-C4/main,nightism/addressbook-level4,snehasp13/main,CS2103AUG2016-T11-C4/main,snehasp13/main,nightism/addressbook-level4