Steps to reproduce the issue

1. Have a lot of modules. Maybe a 200 or so.
2. Edit a menu item. Any menu item.

Expected result

The menu item edit page should render quickly with minimal html and js and certainly not crash because of running out of memory.

Actual result

Actually you might run out of memory and crash because 'bootstrap.renderModal' is not the least bit scalable.

System information (as much as possible)

Doesn't matter.

Additional comments

This feature was just badly implemented in a way that doesn't scale at all. It shouldn't matter how many links to open module editors in modal dialogs you have, you should only need one javascript function to open them all and you should only need one block of html that you can reuse for all modals. This would normally be easy to do but JHtmlBootstrap::renderModal makes it impossible by using an id as a selector. So the only solution is to not use that function or its accompanying layout. Will this have any implications?