Update reset button implementation in app.py: change button to use a unique key for state management, ensuring proper functionality in the trimming options section.

app.py

@@ -802,7 +802,7 @@ with tab3:
                     
                     submitted = st.form_submit_button("Submit")
             with st.expander('Trimming Options'):
-                with st.button('Reset Portfolio'):
+                if st.button('Reset Portfolio', key='reset_port'):
                     st.session_state['portfolio'] = st.session_state['origin_portfolio'].copy()
                 with st.form(key='trim_form'):
                     performance_type = st.selectbox("Select sort type", ['median', 'Finish_percentile'])