Fixed vertical overflow hidden

src/editor/components/sidepanel.css

 .editor-sidepanel {
     /* resize: horizontal; */
-    overflow: auto;
+    max-height: 85%;
+    overflow-y: auto;
+    overflow-x: hidden;
     min-width: 300px;
     height: inherit;
     margin: 0.3rem 0.3rem 0.3rem auto;