Forward port #2789: windows fixes

[Tobias-Fischer]

Based on #2789

Fixes #2611

Thanks to @traversaro for catching this.

I think this is ready to go.

[Blast545]

👨‍🌾 This PR seems to have introduced a build regression in the MacOS buildfarm.

/Users/jenkins/workspace/gazebo-ci-gazebo11-homebrew-amd64/gazebo/gazebo/sensors/GaussianNoiseModel.cc:222:7: error: use of undeclared identifier 'math'; did you mean 'ignition::math'?
  if(!math::equal(0.0, this->biasStdDev))
      ^~~~
      ignition::math

Can you take a look @scpeters @Tobias-Fischer ?

https://build.osrfoundation.org/job/gazebo-ci-gazebo11-homebrew-amd64/106/consoleFull

[scpeters]

👨‍🌾 This PR seems to have introduced a build regression in the MacOS buildfarm.

Can you take a look @scpeters @Tobias-Fischer ?

https://build.osrfoundation.org/job/gazebo-ci-gazebo11-homebrew-amd64/106/consoleFull

I made a mistake in c65a745 but fixed it in #3128