Use Navigate in lieu fo window history for improved stability (& fixe…

…s needing to 'double cancel' out of some forms, like the EPICollection form)

src/src/App.js

@@ -313,7 +313,8 @@ export function App (props){
   };
 
   function handleCancel(){
-    window.history.back();  
+    // window.history.back();  
+    navigate("/");
   }
   const onClose = (event, reason) => {
       navigate("/");