fix(menu): Don't render Menu when it's closed

[ryanseddon]

Description

If you tried to make dynamic prop changes to Menu it would throw due to Popper.js trying to get the computed styles of null.

Detail

Simple fix here is to just not render the Menu when the menu is closed.

Checklist

• 👌 design updates are Garden Designer approved (add the
  designer as a reviewer)
• 💅 view component styling is based on a Garden CSS
  component
• 🌐 Styleguidist demo is up-to-date (yarn start)
• ⬅️ renders as expected with reversed (RTL) direction
• 💂‍♂️ includes new unit and snapshot tests
• 📒 any new files are included in the packages src/index.js export
• 📝 tested in Chrome, Firefox, Safari, Edge, and IE11

[coveralls]

Pull Request Test Coverage Report for Build 330

• 21 of 23 (91.3%) changed or added relevant lines in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage decreased (-0.003%) to 96.143%

---

Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
packages/menus/src/containers/MenuContainer.js	21	23	91.3%

Totals
Change from base Build 327:	-0.003%
Covered Lines:	1683
Relevant Lines:	1697

---

💛 - Coveralls

[zillding]

I believe this is the only change? 😂

[ryanseddon]

Yep the rest was prettier reformatting, best viewed with ?w=1

[zillding]

💯 thanks, Ryan~

[ryanseddon]

This was deleted too @zillding

[ryanseddon]

@jzempel coveralls has got confused due to the prettier format its complaining about new stuff that isn't actually new

[jzempel]

Thanks, Ryan! We can merge around the coveralls check.