rustdoc: toolbar redesign no longer properly handles shortening of long crate names in search dropdown

[steffahn]

Last time I contributed to the design of the crate selection, which was merged with the following PR

• Improve crate selection on rustdoc search results page #100374

I made sure to test the handling of long crate names.

[CLICK TO EXPAND comparison screenshots with the old design]

Old Design:

What happens with a long crate name:

With the new design

• rustdoc: redesign toolbar and disclosure widgets #129545

the behavior seems a lot worse now:

[CLICK TO EXPAND comparison screenshots with the new design]

New Design:

What happens with a long crate name:

(Refer to the last screenshot above for the following description.)

In particular, I’m noticing that the button grows too large, shifts down a little but for some reason, and then pushes the Settings/Help/Summary control elements off-screen.

I don’t recall off the top of my head the specific HTML/CSS foo that used made this work in the first place, but possible it’s a relatively simple fix.

cc @GuillaumeGomez, @notriddle

[GuillaumeGomez]

Good catch! Want to send a fix? Otherwise I'll likely do it tomorrow or monday.

[steffahn]

@GuillaumeGomez I don’t think I have too much motivation to get into learning how to use the testing framework this time around, either.

“allow edits by maintainers” is turned on in #131002, so feel free to take over the step of adding appropriate changes to the tests there, and/or point out test failures that are uncovering any actual issues with the PR, which I’d be happy to address.

[GuillaumeGomez]

No problem, thanks for writing the fix. I'll put together the testing part tomorrow.