jeditable - update to trim datepicker content and reset data on options

This commit contains 2 changes for issues observed while testing
some jeditable fields:
1. update the datapicker input to trim whitespace from the
   content input
2. update the options/settings on all input types to reset 'data'
   option to null.
Merge pull request #1797 from bbuckingham/fork-content-filters

jeditable - update to trim datepicker content and reset data on options