fix: mark fiddle as edited if files added/deleted

Author: dsanders11

src/renderer/editor-mosaic.ts

@@ -169,6 +169,8 @@ export class EditorMosaic {
  } else {
  this.hide(id);
  }
+
+ this.isEdited = true;
  }
 
  /// show or hide files in the view
@@ -241,6 +243,8 @@ export class EditorMosaic {
  this.editors.delete(id);
  this.backups.delete(id);
  this.setVisible(getLeaves(this.mosaic).filter((v) => v !== id));
+
+ this.isEdited = true;
  }
 
  /** Wire up a newly-mounted Monaco editor */