TimeChimp UI/UX Improvements

Improves the overall TimeChimp user interface and experience. - Show time entry descriptions on the rows in the day view. - Remove the "TimeChimp Tracker" ad from the timeline view, and make entries full-width. - Listen for ctrl+enter in the description field to submit the form. - Correct 3-digit times in the start and end time fields (e.g. "930" -> "09:30"). - Show time entry end times in the timeline view. - Show time entry descriptions in the timeline view.