Add dummy convert folder to shared folder

www/common/proxy-manager.js

@@ -1071,6 +1071,13 @@ define([
         }
         return Env.user.userObject.hasSubfolder(el, trashRoot);
     };
+    var hasSubSharedFolder = function (Env, el, trashRoot) {
+        if (Env.folders[el]) {
+            var uo = Env.folders[el].userObject;
+            return uo.hasSubSharedFolder(uo.find[uo.ROOT]);
+        }
+        return Env.user.userObject.hasSubSharedFolder(el, trashRoot);
+    };
     var hasFile = function (Env, el, trashRoot) {
         if (Env.folders[el]) {
             var uo = Env.folders[el].userObject;
@@ -1140,6 +1147,7 @@ define([
             isInTrashRoot: callWithEnv(isInTrashRoot),
             comparePath: callWithEnv(comparePath),
             hasSubfolder: callWithEnv(hasSubfolder),
+            hasSubSharedFolder: callWithEnv(hasSubSharedFolder),
             hasFile: callWithEnv(hasFile),
             // Data
             user: Env.user,

www/common/userObject.js

@@ -156,6 +156,20 @@ define([
             }
         };
 
+        exp.hasSubSharedFolder = function (folder) {
+            for (var el in folder) {
+                if (isSharedFolder(folder[el])) {
+                    return true;
+                }
+                else if (isFolder(folder[el])) {
+                    if (exp.hasSubSharedFolder(folder[el])) {
+                        return true;
+                    }
+                }
+            }
+            return false;
+        }
+
         // Get data from AllFiles (Cryptpad_RECENTPADS)
         var getFileData = exp.getFileData = function (file) {
             if (!file) { return; }