Fix Duo iFrame on mobile devices (#3318)
Fix Duo iFrame on mobile devices (#3318)

* Implement iFrame as documented on https://duo.com/docs/duoweb.  This fixes issue with iFrame not displaying properly on mobile devices

* Update casDuoLoginView.html

pdrados/cas,philliprower/cas,leleuj/cas,leleuj/cas,leleuj/cas,philliprower/cas,Jasig/cas,rkorn86/cas,apereo/cas,Jasig/cas,apereo/cas,fogbeam/cas_mirror,fogbeam/cas_mirror,philliprower/cas,apereo/cas,rkorn86/cas,apereo/cas,leleuj/cas,philliprower/cas,apereo/cas,pdrados/cas,philliprower/cas,pdrados/cas,philliprower/cas,leleuj/cas,Jasig/cas,pdrados/cas,philliprower/cas,rkorn86/cas,pdrados/cas,fogbeam/cas_mirror,pdrados/cas,apereo/cas,leleuj/cas,fogbeam/cas_mirror,Jasig/cas,rkorn86/cas,apereo/cas,fogbeam/cas_mirror,fogbeam/cas_mirror