Update app.py

app.py

@@ -224,12 +224,12 @@ def main():
                 with open(file, 'r') as f:
                     file_contents = f.read()
                     next_action='search'
-        with col2:
+        with col3:
             if st.button("📂", key="open_"+file):  # open emoji button
                 with open(file, 'r') as f:
                     file_contents = f.read()
                     next_action='open'
-        with col3:
+        with col4:
             if st.button("🗑", key="delete_"+file):
                 os.remove(file)
                 st.experimental_rerun()