Clean up the language for the new option to cache date values, and note that it could cause performance issues.

Issue #874322, The All Day functionality has been moved into a separate module and hooks were added to make it easier for other modules to inject steps into date processing.

Issue #1252952 follow up, Move checkbox setting to the same spot where time is set, and don't show option on dates without time.

Issue #1216878, Re-introduce 'repeat' as a field setting rather than a widget type so people can't try to switch back and forth between repeating and non-repeating dates. Eliminate repeat widgets.

Issue #1249724 by KarenS, Gábor Hojtsy, David_Rothstein, Improve usability of date and time input configuration.

Issue #1239934 by David_Rothstein and Gábor Hojtsy, Reuse the 'years back and forward' dropdown widget on the Views filter settings page.

Issue #1245556 by David_Rothstein, Date granularity description incorrectly implies that it affects the date attributes that are displayed

Issue #1234140 by arlinsundbulte, Change terminology in user-facing text from 'From/To Date' to 'Start/End Date'.

#993148 Use url() for link to date format page in date widget settings so it works without clean urls.