Seriously, I hate flyout menus with a passion, and now they’re popping up all over the place in the admin screen. (They are particularly heinous when you use the blue admin theme, because they add a dark arrow. Eye dirt.)
How do I disable the flyout menu? They add zero functionality and usability to my workflow.
Thanks
It’s a bit of a workarround but here you go:
Put it in your functions.php
Aaron Campbell wrote a gist to expand all menus all the time. The dev chat today also indicated some issues in the blue theme.
For more discussion, see Admin menu doesn’t expand/collapse in 3.3 beta 1. Why? in the Support forums.
The solution provided is not working in modern version, but I’ve finally found how to fix it in a new one, just add
via custom css plugin or browser add-on and flyouts both on :hover and :active will be hidden