fix(Modal): set scrolling body class on re-open

[ayastreb]

Fixes #2150 by unsetting scrolling state prop when modal is closed.

[codecov-io]

Codecov Report

Merging #2152 into master will not change coverage.
The diff coverage is 100%.

@@           Coverage Diff           @@
##           master    #2152   +/-   ##
=======================================
  Coverage   99.76%   99.76%           
=======================================
  Files         151      151           
  Lines        2602     2602           
=======================================
  Hits         2596     2596           
  Misses          6        6

Impacted Files	Coverage Δ
src/modules/Modal/Modal.js	100% <100%> (ø)	⬆️

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[lewisblackwood]

@layershifter could this PR be reviewed and merged? Would help resolve a bug in our project when scrolling modal is closed and reopened. Thanks!

[layershifter]

@lewisblackwood I want to hear the opinion from @levithomason before merge this

[levithomason]

This is an OK solution to the issue at hand.

We have another problem with Modals and adding/removing body classes. When stacking Modals, closing the second Modal will remove body classes that the first Modal may still need. We'll tackle that on another PR.

[levithomason]

Released in semantic-ui-react@0.75.0