Popover: fix #1285 bug

[Chubarkin]

Hello!
My PR fixes memory leak errors that exist in components that use the Popover component with the Scroll directive.

Many event listeners were registered, but the target element did not change.
This problem we can see on https://muse-ui.org/#/en-US/select using Memory Chrome DevTools.

[codecov-io]

Codecov Report

Merging #1425 into master will increase coverage by 0.05%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master    #1425      +/-   ##
==========================================
+ Coverage   30.18%   30.24%   +0.05%     
==========================================
  Files         220      220              
  Lines        3578     3581       +3     
  Branches      749      750       +1     
==========================================
+ Hits         1080     1083       +3     
  Misses       1880     1880              
  Partials      618      618

Impacted Files	Coverage Δ
src/internal/directives/scroll.js	84.21% <100%> (+2.96%)	⬆️

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