Fix dropdowns

[louismaximepiton]

Fixes #35968

Should be merged after #35948

Re-introducing @mdo 's changes in #35893
Tried my best to understand the expected behaviour on Esc pressed. Feel free to ask or request changes

[mdo]

Should be merged after #35948

This doesn't look to be required based on my testing.

[GeoSot]

@louismaximepiton I know the PR is merged now, and it is late for questions, however I need your help.

Can you explain me the reason we need event.stopPropagation() on escape event?

and if it is ok with you, is it possible to add a test (new pr) to support the 'shown' check ?

[louismaximepiton]

Yup, no problem, as explained in #35968, there was an issue when wraping a dropdown in an other element that was based on escape event, such as offcanvas : When trying to escape the dropdown, escape the offcanvas too in all cases.

Then, I thought that with your last refactoring in twbs@bb7664d, you wanted to identify two cases :

• the opened dropdown, that should not spread the escape event
• the closed dropdown, that should spread the escape event to its parents

For the tests, I'll try to develop them next week if you don't mind !

EDIT : Sorry to be a bit intrusive, but you should maybe consider re-opening #35948 !