Bring back localization for datepicker

Now in our own file, so that we do not have to rewrite upstream sources.
Signed-off-by: Michal Čihař <michal@cihar.com>

weblate/static/loader-bootstrap.js

@@ -692,4 +692,57 @@ $(function () {
             .attr('action', $(this).attr('href'))
             .submit();
     });
+
+    /* Datepicker localization */
+    $.fn.datepicker.dates.en = {
+        days: [
+            gettext("Sunday"), gettext("Monday"), gettext("Tuesday"),
+            gettext("Wednesday"), gettext("Thursday"), gettext("Friday"),
+            gettext("Saturday"), gettext("Sunday")
+        ],
+        daysShort: [
+            pgettext("Short (eg. three letter) name of day in week", "Sun"),
+            pgettext("Short (eg. three letter) name of day in week", "Mon"),
+            pgettext("Short (eg. three letter) name of day in week", "Tue"),
+            pgettext("Short (eg. three letter) name of day in week", "Wed"),
+            pgettext("Short (eg. three letter) name of day in week", "Thu"),
+            pgettext("Short (eg. three letter) name of day in week", "Fri"),
+            pgettext("Short (eg. three letter) name of day in week", "Sat"),
+            pgettext("Short (eg. three letter) name of day in week", "Sun")
+        ],
+        daysMin: [
+            pgettext("Minimal (eg. two letter) name of day in week", "Su"),
+            pgettext("Minimal (eg. two letter) name of day in week", "Mo"),
+            pgettext("Minimal (eg. two letter) name of day in week", "Tu"),
+            pgettext("Minimal (eg. two letter) name of day in week", "We"),
+            pgettext("Minimal (eg. two letter) name of day in week", "Th"),
+            pgettext("Minimal (eg. two letter) name of day in week", "Fr"),
+            pgettext("Minimal (eg. two letter) name of day in week", "Sa"),
+            pgettext("Minimal (eg. two letter) name of day in week", "Su")
+        ],
+        months: [
+            gettext("January"), gettext("February"), gettext("March"),
+            gettext("April"), gettext("May"), gettext("June"), gettext("July"),
+            gettext("August"), gettext("September"), gettext("October"),
+            gettext("November"), gettext("December")
+        ],
+        monthsShort: [
+            pgettext("Short name of month", "Jan"),
+            pgettext("Short name of month", "Feb"),
+            pgettext("Short name of month", "Mar"),
+            pgettext("Short name of month", "Apr"),
+            pgettext("Short name of month", "May"),
+            pgettext("Short name of month", "Jun"),
+            pgettext("Short name of month", "Jul"),
+            pgettext("Short name of month", "Aug"),
+            pgettext("Short name of month", "Sep"),
+            pgettext("Short name of month", "Oct"),
+            pgettext("Short name of month", "Nov"),
+            pgettext("Short name of month", "Dec")
+        ],
+        today: gettext("Today"),
+        clear: gettext("Clear"),
+        weekStart: django.formats.FIRST_DAY_OF_WEEK,
+        titleFormat: "MM yyyy"
+    };
 });