Update WD_MAP_Excel.bas

Sub OpenExistingTimeline()
  - changed reference to point to a .xlsx file instead of a .xlsm file.
  - changed the name of the sheet being referenced from "ProjectTimeline" to "Project Timeline"
  - removed section to clear the range of data that exists.  ListObject tables do not require this
  - added a call to a new function, "SiteAddr", which reads the Site and ABBR content controls and copies those values to a title block in Excel.
  - changed the reference of where to transpose the array to the beginning of the data range inside of the table.