FIX regression devtool, in case of cross domain parent, window.parent might throw

[ndelangen]

I caused a regression, this fixes it.

The regression occurs when the iframe and parent are on different domains or the manager frame itself is iframed in on a different domain.

calling window.parent might throw, so a try-catch is added.

@tmeasday

[tmeasday]

Seems reasonable to me! Not sure we need the console.log, but no harm I guess

[codecov]

Codecov Report

Merging #4199 into master will not change coverage.
The diff coverage is n/a.

@@          Coverage Diff           @@
##           master   #4199   +/-   ##
======================================
  Coverage    40.6%   40.6%           
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  Files         491     491           
  Lines        5832    5832           
  Branches      780     780           
======================================
  Hits         2368    2368           
  Misses       3088    3088           
  Partials      376     376

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