Simplified the display of periods in the month view when a booking is just one period long.   See SF Support Requests #575

git-svn-id: http://svn.code.sf.net/p/mrbs/code/mrbs/trunk@2855 25f7e783-145e-4f2d-a9f8-dd7182bfe9c7
Restructured code

git-svn-id: http://svn.code.sf.net/p/mrbs/code/mrbs/trunk@2856 25f7e783-145e-4f2d-a9f8-dd7182bfe9c7
Simplified code

git-svn-id: http://svn.code.sf.net/p/mrbs/code/mrbs/trunk@2857 25f7e783-145e-4f2d-a9f8-dd7182bfe9c7