when editing content of a cell 1 click should highlight content and overwrite all content
clicking a second time should place the cursor and insert the edit at the cursor
at this time I'm seeing the edit get prepended rather than overwriting or inserting at cursor in the python example (both on master and develop branches)

working as expected in js example (ie npm run build.watch visit: http://127.0.0.1:8080/ )
not working on master nor develop for configurable options example (gunicorn index:server -b localhost:8050 --reload http://127.0.0.1:8050/editor-with-configurable-options)
working on develop (example not on master yet :) ) for dataframe updating example (gunicorn index:server -b localhost:8050 --reload http://127.0.0.1:8050/dataframe-updating-graph-fe)