The admin UI is not responsive, unfortunately -- that would be a major undertaking, but we're making steps toward that direction. It's the same fluid layout. The new graphs do scale automatically which is nice though, as the old jqplot ones had to be refreshed.
I see. It looks like the cPanel module only makes the changes if Use Module is checked.
You should be able to do the following:
Update their service in Blesta to change their username to the username they have in cPanel
Remove their password (set it to a blank value). This is so that Blesta will not attempt to overwrite it in case it differs from what's stored in cPanel
Leave "Use Module" checked
Save
Their username should now be updated in Blesta, and no data should be changed in cPanel because it's all the same anyway.
Well if it's pure HTML like a table you can do it by copying it into a page like: https://www.evolvewebhost.com/shared-hosting that's the easy way. PHP is server powered so depending what the PHP is you would put it in the /structure.pdt.
Then the HTML would go in the portal page or / custom page either with a edit of the portal, Naja7Host free admin_tools or our BlestaCMS.
So PHP / JS goes into the /app/views/client/theme_name/structure.pdt
Then html goes into the Portal: