[#1802, #1803, #1804, #1876] Added HTML App Menu for Windows

[tonyanziano]

#1876, #1802, #1803, #1804

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[coveralls]

Coverage increased (+0.9%) to 66.84% when pulling 71537b2 on toanzian/app-menu-show-via-props into c53ac1d on master.

[corinagum]

looks awesome! I just left teeny comments.

I also tested this out with NVDA and everything seems to work awesome!

The only comment I have is that when using browse mode in the app menu, for example highlighting "Zoom in" under View, pressing escape, then Ctrl + LeftArrow to highlight Conversation will say "Out of menu button menu button sub menu Conversation". I'm assuming this is because it's trying to highlight within the sub menu, rather than the top level, but that panel is disabled. I'm also not sure if this is something the a11y team would highlight as need to fix, but I thought I would mention it just in case.

[tonyanziano]

@corinagum Addressed your comments.

Thanks for the note on the menu accessibility, I didn't even know you could use Ctrl+<arrow> to navigate lists, so I didn't test any of that.

My thought is that we submit it as is, and then if the a11y team ends up dinging us for that, we can fix it. However, to my memory, I don't think they reported any issues involving Ctrl+<arrow> navigation, but maybe we just didn't have any instances like the app menu.