don't refresh page on channel creation and ignore case when sorting channels in sidebar

web/react/components/sidebar.jsx

@@ -116,10 +116,10 @@ function getStateFromStores() {
     var channels = ChannelStore.getAll();
     if (channels) {
         channels.sort(function chanSort(a, b) {
-            if (a.display_name < b.display_name) {
+            if (a.display_name.toLowerCase() < b.display_name.toLowerCase()) {
                 return -1;
             }
-            if (a.display_name > b.display_name) {
+            if (a.display_name.toLowerCase() > b.display_name.toLowerCase()) {
                 return 1;
             }
             return 0;