WUI: add time page was rendered to client and introducer welcome pages. closes #1972

Author: Leif Ryge <leif@synthesize.us>
Signed-off-by: Daira Hopwood <david-sarah@jacaranda.org>
revert 721726cd81b04a7ee0231d7d08c6526176dbacc3 (landed upstream differently)
Merge branch 'master' into truckee