Support change the aria role of menu or menuitem.

[fatelei]

When menu is used with select support search mode

• the role of menu should be listbox
• the role of menuitem should be option

so that, the screen reader like nvda can read the item in option.

Remove the aria-activedescendant

This attribute has no meaning in menu.

Ref

• https://www.w3.org/TR/wai-aria/roles#combobox
• https://www.w3.org/WAI/GL/wiki/Using_aria-activedescendant_to_allow_changes_in_focus_within_widgets_to_be_communicated_to_Assistive_Technology

[coveralls]

Coverage increased (+0.03%) to 84.8% when pulling c4a48e9 on fatelei:aria-issue into 5a5d6c8 on react-component:master.

[coveralls]

Coverage increased (+0.03%) to 84.8% when pulling c4a48e9 on fatelei:aria-issue into 5a5d6c8 on react-component:master.

[coveralls]

Coverage remained the same at 84.77% when pulling b35ad16 on fatelei:aria-issue into 5a5d6c8 on react-component:master.

[coveralls]

Coverage remained the same at 84.77% when pulling 847b3bb on fatelei:aria-issue into 5a5d6c8 on react-component:master.

[fatelei]

@afc163

[benjycui]

Why?

[yesmeck]

@fatelei Why do you remove this line?

[picodoth]

aria-activedescendant="" is an invalid value

[picodoth]

@fatelei woops, I did a similar fix here: #137. Sorry, didn't realize this one. But I believe #137 covers more invalid aria-* values. Do you mind to close this one?

[fatelei]

@picodoth I will close this pr