Upgrade notes for Shiny 0.14.1

This is a maintenance release of Shiny, with some bug fixes and minor new features.

Full changelog

Restored file inputs are now copied on restore, so that the restored application can’t modify the bookmarked file. (#1370)
Added support for plot interaction in the development version of ggplot2, 2.1.0.9000. Also added support for ggplot2 plots with coord_flip() (in the development version of ggplot2). (hadley/ggplot2#1781, #1392)

Fixed #1093 better: updateRadioButtons() and updateCheckboxGroupInput() were not working correctly if the choices were given as a numeric vector. This had been solved in #1291, but that introduced a different bug #1396 that this better fix avoids. (#1370)
Fixed #1368: If an app with a file input was bookmarked and restored, and then the restored app was bookmarked and restored (without uploading a new file), then it would fail to restore the file the second time. (#1370)
Fixed #1369: sliderInput() did not allow showing numbers without a thousands separator.
Fixed #1346 and #1107 : jQuery UI’s datepicker conflicted with the bootstrap-datepicker used by Shiny’s dateInput() and dateRangeInput(). (#1374)

Updated to bootstrap-datepicker 1.6.4. (#1218, #1374)
Updated to jQuery UI 1.12.1. Previously, Shiny included a build of 1.11.4 which was missing the datepicker component due to a conflict with the bootstrap-datepicker used by Shiny’s dateInput() and dateRangeInput(). (#1374)

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