fix(Toolbar): close menu when it looses focus

[sophieH29]

Fixes #1624

[codecov]

Codecov Report

Merging #1688 into master will decrease coverage by 0.02%.
The diff coverage is 16.66%.

@@            Coverage Diff             @@
##           master    #1688      +/-   ##
==========================================
- Coverage   70.95%   70.92%   -0.03%     
==========================================
  Files         860      860              
  Lines        7144     7148       +4     
  Branches     2076     2077       +1     
==========================================
+ Hits         5069     5070       +1     
- Misses       2069     2072       +3     
  Partials        6        6

Impacted Files	Coverage Δ
...kages/react/src/components/Toolbar/ToolbarItem.tsx	45.61% <0%> (-2.54%)	⬇️
...ssibility/Behaviors/Toolbar/toolbarItemBehavior.ts	100% <100%> (ø)	⬆️

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[jurokapsiar]

I have tested this - tab correctly closes the menu, but shift+tab focuses the triggering button and the menu is not closed

[mnajdova]

Actually, with the latest changes, shift tab is focusing the trigger element :\ Can you check this again