WebUI Add Limit Share Ratio context menu option

Closes #6815, #7602.

src/webui/www/private/transferlist.html

@@ -61,6 +61,9 @@
             UploadLimit: function(element, ref) {
                 uploadLimitFN();
             },
+            ShareRatio : function (element, ref) {
+                shareRatioFN();
+            },
 
             SequentialDownload: function(element, ref) {
                 toggleSequentialDownloadFN();