rtl hints updates

1. semantic.css, using new directive to prepend the value.
2. sidebar.less, padding transition is required by a fix for sidebar in
rtl view mode.

server/files/stylesheets/semantic.css

@@ -44,7 +44,7 @@ body {
 }
 
 body#example {
-  font-family: "Open Sans", "Helvetica Neue", "Helvetica", "Arial", sans-serif/*rtl:"Droid Arabic Kufi", "Open Sans", "Helvetica Neue", "Helvetica", "Arial", sans-serif */;
+  font-family: "Open Sans", "Helvetica Neue", "Helvetica", "Arial", sans-serif/*rtl:prepend:"Droid Arabic Kufi","Droid Sans", */;
   background: #FCFCFC url(../images/bg.jpg) repeat;
   margin: 0px;
   padding: 0px;
@@ -60,7 +60,7 @@ h2,
 h3,
 h4,
 h5 {
-  font-family: "Source Sans Pro", "Helvetica Neue", "Helvetica", "Arial", sans-serif/*rtl:"Droid Arabic Kufi", "Source Sans Pro", "Helvetica Neue", "Helvetica", "Arial", sans-serif */;;
+  font-family: "Source Sans Pro", "Helvetica Neue", "Helvetica", "Arial", sans-serif/*rtl:prepend:"Droid Arabic Kufi","Droid Sans", */;
 }
 
 /*

src/modules/sidebar.less

@@ -15,23 +15,28 @@
 body {
   -webkit-transition:
     margin 0.3s ease,
-    -webkit-transform 0.3s ease
+    -webkit-transform 0.3s ease/*rtl:append:,
+    padding 0.3s ease*/
   ;
   -moz-transition:
     margin 0.3s ease,
-    -moz-transform 0.3s ease
+    -moz-transform 0.3s ease/*rtl:append:,
+    padding 0.3s ease*/
   ;
   -o-transition:
     margin 0.3s ease,
-    transform 0.3s ease
+    transform 0.3s ease/*rtl:append:,
+    padding 0.3s ease*/
   ;
   -ms-transition:
     margin 0.3s ease,
-    transform 0.3s ease
+    transform 0.3s ease/*rtl:append:,
+    padding 0.3s ease*/
   ;
   transition:
     margin 0.3s ease,
-    transform 0.3s ease
+    transform 0.3s ease/*rtl:append:,
+    padding 0.3s ease*/
   ;
 }