fix tree loading on mobile interface, closes #839

src/public/javascripts/mobile.js

@@ -87,6 +87,8 @@ async function showTree() {
             });
         }
     });
+
+    treeService.setTree($.ui.fancytree.getTree("#tree"));
 }
 
 $detail.on("click", ".note-menu-button", async e => {

src/public/javascripts/services/sidebar.js

@@ -5,6 +5,7 @@ import splitService from "./split.js";
 import optionService from "./options.js";
 import server from "./server.js";
 import noteDetailService from "./note_detail.js";
+import utils from "./utils.js";
 
 const $sidebar = $("#right-pane");
 const $sidebarContainer = $('#sidebar-container');
@@ -15,6 +16,10 @@ const $hideSidebarButton = $("#hide-sidebar-button");
 optionService.waitForOptions().then(options => toggleSidebar(options.is('rightPaneVisible')));
 
 function toggleSidebar(show) {
+    if (utils.isMobile()) {
+        return;
+    }
+
     $sidebar.toggle(show);
     $showSidebarButton.toggle(!show);
     $hideSidebarButton.toggle(show);

src/public/javascripts/services/tree.js

@@ -913,6 +913,10 @@ function getNodeByKey(key) {
     return tree.getNodeByKey(key);
 }
 
+function setTree(treeInstance) {
+    tree = treeInstance;
+}
+
 keyboardActionService.setGlobalActionHandler('CollapseTree', () => collapseTree()); // don't use shortened form since collapseTree() accepts argument
 $collapseTreeButton.on('click', () => collapseTree());
 
@@ -949,5 +953,6 @@ export default {
     focusTree,
     scrollToActiveNote,
     duplicateNote,
-    getNodeByKey
+    getNodeByKey,
+    setTree
 };