applied fix to book a test drive: [Book a Test Drive] Still asking for
Retailer even if retailer is selected
[Contact Us] Add Please Select Retailer to retailer list instead of
pre-select the first retailer (Downtown)
[Contact US] Disable Retailer if reason is any head office.
[Contact Us] Showing Blank Message after Submit
Merge pull request #519 from tonyrd/master

A bunch of small fixes to forms