Add guard for empty object to date_field input component.
Add guard for empty object to date_field input component.

hauledev/bookyt,xuewenfei/bookyt,xuewenfei/bookyt,hauledev/bookyt,gaapt/bookyt,wtag/bookyt,silvermind/bookyt,gaapt/bookyt,wtag/bookyt,silvermind/bookyt,huerlisi/bookyt,wtag/bookyt,hauledev/bookyt,silvermind/bookyt,hauledev/bookyt,huerlisi/bookyt,xuewenfei/bookyt,gaapt/bookyt,gaapt/bookyt,huerlisi/bookyt,silvermind/bookyt