Hi Brahyam,
if I understood correctly you want to have the menu like the one in the older Knowage version.
Is not possible with a configuration value at the moment, but you can change the css file to have the graphical behaviour you want.
If you are using sass change _menu.scss under themes/commons/css/sass/components (and remember to regenerate css with a scss engine) or just change customStyle.css under themen/commons/css.
The list view is the default one, but you are right, there should be the possibility for the user to choose the default from configuration.
I will add the story in our backlog, so expect the functionality in the next releases.
Thanks for the feeback.
Regards