fix: PR review comments, add clarification about the testcase

Author: lazysegtree

testsuite/tests/empty_panel_test.py

@@ -49,7 +49,9 @@ def test_execute(self) -> None:
         self.start_spf()
         self.send_input()    
         time.sleep(tconst.OPERATION_DELAY)
-        # To not close spf
+        # Intentionally not closing spf to ensure it remains running,
+        # which is verified by the validate_spf_running flag which is set 
+        # to true for this testcase