feat(Focus): focus indicator for additional documents

[jurokapsiar]

Add event handlers that detect input type to additional documents as well

[codecov]

Codecov Report

Merging #1816 into master will decrease coverage by 0.11%.
The diff coverage is 39.28%.

@@            Coverage Diff             @@
##           master    #1816      +/-   ##
==========================================
- Coverage   69.74%   69.63%   -0.12%     
==========================================
  Files         875      875              
  Lines        7519     7534      +15     
  Branches     2186     2220      +34     
==========================================
+ Hits         5244     5246       +2     
- Misses       2267     2280      +13     
  Partials        8        8

Impacted Files	Coverage Δ
packages/react/src/lib/whatInput.ts	58.76% <38.46%> (-7.91%)	⬇️
...ackages/react/src/components/Provider/Provider.tsx	93.47% <50%> (-1.98%)	⬇️

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[layershifter]

There is also docElem with calls like:

docElem.setAttribute(`data-whatinput`, currentInput)
docElem.setAttribute('data-whatelement', currentElement)

Should we also update it?

[jurokapsiar]

Should we also update it?
Agreed offline to handle it separately.