Enable Schema handeling

Author: Stefterv

app/src/processing/app/Base.java

@@ -1364,10 +1364,10 @@ private File moveLikeSketchFolder(File pdeFile, String baseName) throws IOExcept
    * @param schemeUri the full URI, including pde://
    */
   public Editor handleScheme(String schemeUri) {
-//    var result = Schema.handleSchema(schemeUri, this);
-//    if (result != null) {
-//      return result;
-//    }
+    var result = Schema.handleSchema(schemeUri, this);
+    if (result != null) {
+      return result;
+    }
 
     String location = schemeUri.substring(6);
     if (location.length() > 0) {