Hideable Scheduled Shows tab

Makes the first tab remoeable and the tracks page be full width after removing the last tab. You can press the "Dashboard" link to open it back up again.

airtime_mvc/public/js/airtime/library/spl.js

@@ -855,17 +855,20 @@ var AIRTIME = (function(AIRTIME){
 
             tab.close();
 
-            $.ajax( {
-                url : baseUrl+"usersettings/set-library-screen-settings",
-                type : "POST",
-                data : {
-                    settings : {
-                        playlist : false
+            // save settings if we are not closing the "Scheduled Shows" tab
+            if (tabId != "0") {
+                $.ajax( {
+                    url : baseUrl+"usersettings/set-library-screen-settings",
+                    type : "POST",
+                    data : {
+                        settings : {
+                            playlist : false
+                        },
+                        format : "json"
                     },
-                    format : "json"
-                },
-                dataType : "json"
-            });
+                    dataType : "json"
+                });
+            }
         });
 
         $pl.find("#save_button").unbind().on("click", function(event) {