I'd like to be able to change the width of the docked popup box on the right hand side of the screen from 350px to 750px for one particular map. It'd be great if there was a Custom CSS text box on the admin page for each map (the page where you choose the widgets etc) which would enable you to change this width and also let you configure how many other features appear in the app.
I've seen a similar Custom CSS box in the ESRI Minimalist web app (see image below).

I'm using Localmaps 2.2.