Global [role=tooltip] styles impact notebook extensions

[magdapoppins]

In fb08a1b#diff-321a1fb8c95f4257fbede791b7856b7cR438-R459 some global styles regarding elements with role="tooltip" were introduced. They were meant to fix issues specific to the .dynamic-buttons-div element, and wouldn't need to be put in global scope.

Setting every element with role="tooltip" visibility to hidden impacts notebook extensions and makes it tedious to use this attribute correctly.

I suggest changing the scope of the above mentioned style to .dynamic-buttons [role=tooltip] in notebook/static/tree/less/tree.less line 438.

[akx]

The related issue and PR (so GitHub links them here): #3964, #4729

[Zsailer]

@magdapoppins, good catch! Would you be interested in opening a PR with your proposed fix? Otherwise, I'm happy to submit the change myself. Thanks!

[magdapoppins]

@Zsailer I can open a pr tomorrow. 👍