rework editSelectedFeeds to use http POST

prefs.js

@@ -680,15 +680,23 @@ function editSelectedFeeds() {
 			return;
 		}
 
-		notify("");
+		notify_progress("Loading, please wait...");
 
 		var query = "backend.php?op=pref-feeds&subop=editfeeds&ids=" +
 			param_escape(rows.toString());
 
+		console.log(query);
+
 		if (dijit.byId("feedEditDlg"))
 			dijit.byId("feedEditDlg").destroyRecursive();
 
-		dialog = new dijit.Dialog({
+		new Ajax.Request("backend.php", {
+			parameters: query,
+			onComplete: function(transport) {
+
+				notify("");
+
+				var dialog = new dijit.Dialog({
 					id: "feedEditDlg",
 					title: __("Edit Multiple Feeds"),
 					style: "width: 600px",
@@ -768,10 +776,12 @@ function editSelectedFeeds() {
 							}})
 						}
 					},
-			href: query});
+					content: transport.responseText});
 
 					dialog.show();
 
+			} });
+
 	} catch (e) {
 		exception_error("editSelectedFeeds", e);
 	}