added mobile check on the focus after blur event

[Alqanar]

Closes: #521
In our project we encountered a similar problem problem as described in issue 521

In the PR I added a mobile check and a check if we have current in the selectorRef

[vercel]

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[codecov]

Codecov Report

Merging #611 (a6a1200) into master (d5018f5) will increase coverage by 0.00%.
The diff coverage is 100.00%.

❗ Current head a6a1200 differs from pull request most recent head 75b4340. Consider uploading reports for the commit 75b4340 to get more accurate results

@@           Coverage Diff           @@
##           master     #611   +/-   ##
=======================================
  Coverage   99.17%   99.18%           
=======================================
  Files          20       20           
  Lines         974      977    +3     
  Branches      327      327           
=======================================
+ Hits          966      969    +3     
  Misses          7        7           
  Partials        1        1           

Impacted Files	Coverage Δ
src/generate.tsx	99.68% <100.00%> (+<0.01%)	⬆️

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[zombieJ]

It's strange that in mobile popupElement contains always the active element menu. But I do not research so much on this. This fix seems ok to me.

[zombieJ]

+ rc-select@12.1.7