add

dist/core.js

@@ -14434,7 +14434,7 @@ BI.Widget = BI.inherit(BI.OB, {
                 })
             })
         }
-        if (this._isRoot === true || (!(this instanceof BI.Layout) && (this._parent && this._parent._isMounted))) {
+        if (this._isRoot === true || !(this instanceof BI.Layout)) {
             this._mount();
         }
     },

dist/widget.js

@@ -19927,7 +19927,7 @@ BI.MultiTreePopup = BI.inherit(BI.Pane, {
             baseCls: 'bi-multi-tree-popup',
             maxWidth: 'auto',
             minWidth: 100,
-            maxHeight: 250,
+            maxHeight: 400,
             onLoaded: BI.emptyFn
         });
     },

src/core/widget.js

@@ -135,7 +135,7 @@ BI.Widget = BI.inherit(BI.OB, {
                 })
             })
         }
-        if (this._isRoot === true || (!(this instanceof BI.Layout) && (this._parent && this._parent._isMounted))) {
+        if (this._isRoot === true || !(this instanceof BI.Layout)) {
             this._mount();
         }
     },

src/widget/multitree/multi.tree.popup.js

@@ -10,7 +10,7 @@ BI.MultiTreePopup = BI.inherit(BI.Pane, {
             baseCls: 'bi-multi-tree-popup',
             maxWidth: 'auto',
             minWidth: 100,
-            maxHeight: 250,
+            maxHeight: 400,
             onLoaded: BI.emptyFn
         });
     },