Add Modal mock (#1794)
Add Modal mock (#1794)

See: https://github.com/facebook/jest/issues/1739
Related to #1739
mpontus/jest,ide/jest,aaron-goshine/jest,facebook/jest,aaron-goshine/jest,skovhus/jest,bookman25/jest,mpontus/jest,cpojer/jest,mpontus/jest,ide/jest,facebook/jest,blainekasten/jest,facebook/jest,cpojer/jest,blainekasten/jest,skovhus/jest,ide/jest,bookman25/jest,skovhus/jest,blainekasten/jest,cpojer/jest,aaron-goshine/jest,bookman25/jest