fix(collapse): "Collapse" component breaks "Dropdown component #5625

[ghost]

Delete overflow style for the active collapse

Close #5625

Why issue happened

When the "collapse div" is going to be collapsed for the first time, "overflow: hidden" is added to it's styles, and then, when block opens back, this rule isn't removed.

PR Checklist

• read and followed the CONTRIBUTING.md guide.
• built and tested the changes locally.
• added/updated tests.
• added/updated API documentation.
• added/updated demos.

[codecov]

Codecov Report

Merging #5626 into development will not change coverage.
The diff coverage is n/a.

@@             Coverage Diff              @@
##           development    #5626   +/-   ##
============================================
  Coverage        52.52%   52.52%           
============================================
  Files                3        3           
  Lines               99       99           
  Branches            17       17           
============================================
  Hits                52       52           
  Misses              37       37           
  Partials            10       10

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[valorkin]

thanks for your contribution