Add functionality to clear player selection in Handbuilder tab of Streamlit app, resetting previous selections and refreshing lineup for improved user experience.

src/streamlit_app.py

@@ -787,7 +787,9 @@ if selected_tab == 'Handbuilder':
     clear_col, save_col, export_col, clear_saved_col, blank_col = st.columns([2, 2, 2, 2, 12])
     with clear_col:
         if st.button("Clear Lineup", key='clear_lineup_button'):
+            st.session_state['previous_player_selection'] = []
             st.session_state['handbuilder_lineup'] = pd.DataFrame(columns=['Player', 'Position', 'Team', 'Salary', 'Median', '2x%', 'Own', 'Slot'])
+            st.rerun()
     with save_col:
         if st.button("Save Lineup", key='save_lineup_button'):
             if 'saved_lineups' in st.session_state: