Update 'Manage Portfolio' section in 'app.py' to source specific positions from 'player_columns' instead of 'working_frame', improving data accuracy for user selections.

app.py

@@ -1882,7 +1882,7 @@ if selected_tab == 'Manage Portfolio':
                         ignore_stacks = []
                     remove_teams_exposure = st.multiselect("Removed/Locked teams?", options=sorted(list(set(st.session_state['projections_df']['team'].unique()))), default=[])
                     specific_replacements = st.multiselect("Specific Replacements?", options=sorted(list(set(st.session_state['projections_df']['player_names'].unique()))), default=[])
-                    specific_columns = st.multiselect("Specific Positions?", options=sorted(list(st.session_state['working_frame'].columns)), default=[])
+                    specific_columns = st.multiselect("Specific Positions?", options=sorted(list(st.session_state['player_columns'])), default=[])
                     submitted_col, export_col = st.columns(2)
                     st.info("Portfolio Button applies to your overall Portfolio, Export button applies to your Custom Export")
                     with submitted_col: