fix(autoreply): fix month-boundary comparison in datepicker UI widget (#134)

Author: Churro

ispconfig3_autoreply/skins/classic/jquery.ui.datetime.min.js

@@ -71,7 +71,7 @@
         }
     }, _calendar: function () {
         var c = this.options, e = null, k = "", n = null, l = null, j = null, h = 0, m = 0, f = this._clean(new Date(this.current)).getTime(), g = this._clean(this.minDate).getTime(), p = this._clean(this.maxDate).getTime(), q = new Date(this.date.getFullYear(), this.date.getMonth(), 0);
-        if (q.getTime() < this.minDate.getTime()) {
+        if (q.getTime() < this._clean(this.minDate).getTime()) {
             this.date.setMonth(this.minDate.getMonth())
         }
         n = this.date.getFullYear(), l = this.date.getMonth();
@@ -136,7 +136,9 @@
     }, _calendarUpdate: function (c, d) {
         switch (c) {
             case"months":
-                this.date.setMonth(this.date.getMonth() + d);
+                var targetMonth = this.date.getMonth() + d;
+                this.date.setDate(1);
+                this.date.setMonth(targetMonth);
                 break;
             case"years":
                 this.date.setFullYear(this.date.getFullYear() + d);
@@ -480,4 +482,4 @@
     }, substrOffset: function (c) {
         return this.substr(this.length + c, this.length)
     }})
-})(jQuery);
+})(jQuery);