upgrade Dojo to 1.6.1

lib/dijit/themes/tundra/layout/TabContainer_rtl.css

@@ -2,37 +2,50 @@
 	-moz-box-orient:horizontal;
 	text-align: right;
 }
+
 .tundra .dijitTabRtl .dijitTabInnerDiv {
 	padding:2px 9px 2px 8px;
 }
+
 .tundra .tabStrip-disabled .tabStripButtonRtl .dijitTabInnerDiv {
-	
+	/* this is not special for RTL mode, but just here to override rule above (for enabled tabstrip) */
 	padding-bottom: 3px;
 	padding-top: 1px;
 }
+
 .tundra .tabStripButtonRtl .dijitTabInnerDiv {
 	padding: 3px 2px 4px 2px;
 }
+
 .tundra .dijitTabPaneWrapper {
 	#zoom: 1;
 }
+
 .dj_ie-rtl .tundra .dijitTabContainerLeft-tabs {
 	margin-left: 1px !important;
 }
+
 .dj_ie-rtl .tundra .dijitTabContainerRight-tabs {
 	margin-right: 1px !important;
 }
+
 .tundra .dijitTabContainerLeft-tabs .dijitTabRtl,
 .tundra .dijitTabContainerRight-tabs .dijitTabRtl {
-	margin-left:0px;
+	margin-left:0;
 }
+
 .dj_ie .tundra .dijitTabRtl .dijitTabInnerDiv {
-	
+	/* without this the tab label and icon become invisible, as though they were set to visibility:hidden */
 	width : 0.1% !important;
 }
+
+
+
 .dj_iequirks-rtl .tundra .dijitTabContainerTopNone,
 .dj_iequirks-rtl .tundra .dijitTabContainerBottomNone {
-	
+	/* this strange rule prevents IE6 bug in themeTesterQuirk.html?dir=rtl upon closing
+	 * "Closable" tab, where the other tabs disappear
+	 */
 	border-left: 1px solid #fff;
 	border-right: 1px solid #fff;
 }