added 3 css classes to control height given number of hours displayed on visual schedule
added 3 css classes to control height given number of hours displayed on visual schedule

fanglinfang/myuw,uw-it-aca/myuw,uw-it-aca/myuw,fanglinfang/myuw,uw-it-aca/myuw,fanglinfang/myuw,uw-it-aca/myuw