In the docs, please stop the menu collapsing every time I click a sub-menu item

[growly]

Expected Behavior

I want the menu to retain the state of whicever submenus I've expanded. This would make browsing the documentation less frustrating.

Actual Behavior

I start with a fully collapsed menu tree:

I expand down to a sub-menu and click it:

My page navigates away and the menu now looks like this again:

Steps to Reproduce the Problem

1. Go to this documentation
2. Open a menu item with a few nested sub-menus, click an item there in
3. Look at the menu again

Specifications

• Version: Google Chrome 108.0.5359.98
• Platform: macos 13.0

[growly]

Update: ok, some items in the menu behave correctly. It might the ones which lead to a page where the menu and content sit in different iframes (or whatever the modern equivalent is).

[mithro]

FYI - @kgugala / @umarcor

[mithro]

Probably related to chipsalliance/f4pga-examples#370