Add save as code snippet command to non-notebook file

Author: jahn96

src/index.ts

@@ -169,12 +169,18 @@ function activateCodeSnippet(
     }
   });
 
-  //Put the command above in context menu
+  // Put the saveCommand above in context menu
   app.contextMenu.addItem({
     command: saveCommand,
     selector: '.jp-Cell'
   });
 
+  // Put the saveCommand in non-notebook file context menu
+  app.contextMenu.addItem({
+    command: saveCommand,
+    selector: '.jp-FileEditor'
+  });
+
   // Add keybinding to save
   app.commands.addKeyBinding({
     command: saveCommand,