Issue #3220837: Updated 12 hour clock logic

modules/jst_clock/js/jst-clock.js

@@ -49,12 +49,8 @@
       var sec = timenow.getSeconds();
       if ( this.props['clock_type'] == 0 ) {
         var am_pm = ""
-        if ( hr <= 12 ) {
-          am_pm = "am";
-        } else {
-          am_pm = "pm";
-          hr = hr - 12;
-        }
+        am_pm = hr < 12 ? "am" : "pm";
+        hr = hr % 12 || 12;
         this.element.html(hr + ":" + LZ(min) + ":" + LZ(sec) + am_pm);
       } else if ( this.props['clock_type'] == 1 ) {
         this.element.html(hr + ":" + LZ(min) + ":" + LZ(sec));