Element: [Feature Request] [Dropdown] Add a tabindex prop to override default tabindex="0"

[raphaelsaunier]

Existing Component

Yes

Component Name

Dropdown

Description

Several components such as Dropdown or Tooltip automatically set a tabindex="0" attribute on their child element.

In certain interfaces and forms where we need more fine-grained control over the tab flow, this behaviour is not desirable.

This could be solved by simply exposing a tabindex prop (which would have a default value of 0).

[jikkai]

@ziyoung Should we expose tabindex attribute for other components in the next major release?