feat(menu): automatic positioning inside viewport

[bmdalex]

feat(menu): automatic positioning inside viewport

Fixes #1360

Description

Open Menus and submenus at lower part of screen

Expected Result

menus and submenus are automatically rendered inside viewport (on top)

Actual Result

menus and submenus are cut off when there is not enough space in the viewport 💣

DEMO with current behavior

[codecov]

Codecov Report

Merging #1384 into master will increase coverage by 0.06%.
The diff coverage is 80.76%.

@@            Coverage Diff             @@
##           master    #1384      +/-   ##
==========================================
+ Coverage   73.51%   73.57%   +0.06%     
==========================================
  Files         786      787       +1     
  Lines        5863     5885      +22     
  Branches     1703     1734      +31     
==========================================
+ Hits         4310     4330      +20     
- Misses       1547     1549       +2     
  Partials        6        6

Impacted Files	Coverage Δ
packages/react/src/components/Menu/MenuItem.tsx	30.85% <0%> (-0.68%)	⬇️
...src/themes/teams/components/Menu/menuItemStyles.ts	7.2% <0%> (+0.11%)	⬆️
packages/react/src/lib/positioner/Popper.tsx	78.78% <100%> (+2.12%)	⬆️
...ckages/react/src/lib/positioner/getScrollParent.ts	89.47% <89.47%> (ø)

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