I am glad that WordPress developers are looking at this but I wonder if I could make a suggestion?
I'm working on a project which is a membership site that includes the use of a customized Admin Bar for ease of user navigation. I'm using Gravity Forms to allow members to enter some personal details about themselves.
Gravity Forms does not have a place to specify tabindex on their forms and I just spent a while recreating the user account area so I could move the tabindexes to 100+ so as to not compete with Gravity Forms fields.
I'm an experienced WordPress developer so mulching the code wasn't too big of a deal, and I do intend to post to Gravity Forms and let them know that they should give users the capability of defining tabindexes but I'm wondering if it is possible to give a higher tabindex to the search function in the admin bar?