fix(Popup): ESC key press on trigger should propagate event if Popup is already closed

[sophieH29]

If ESC key is pressed on a trigger button and Popup is closed, then this keyboard event should propagate to a parent element.

Use case, in chat pane prototype, in the message, when pressing ESC key on more options button of the attachment:
Expected:

• if popup open - close popup
• if popup closed - propagate event, so the focus will go to message container

Actual:
keyboard event is not propagated and focus does not go to the message container

[codecov]

Codecov Report

Merging #1373 into master will increase coverage by 0.01%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master    #1373      +/-   ##
==========================================
+ Coverage   72.92%   72.93%   +0.01%     
==========================================
  Files         775      775              
  Lines        5824     5823       -1     
  Branches     1721     1698      -23     
==========================================
  Hits         4247     4247              
+ Misses       1571     1570       -1     
  Partials        6        6

Impacted Files	Coverage Δ
packages/react/src/components/Popup/Popup.tsx	68.9% <100%> (+0.41%)	⬆️

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