also hide the sidebar collapse buttons when sidebars are hidden for tablets/phones by media queries for small screens.
also hide the sidebar collapse buttons when sidebars are hidden for
tablets/phones by media queries for small screens.

tduerkop/cmv-app,coshx/cmv-app,fileunderjeff/cmv-app,etes/ConfigurableViewerJSAPI,ebonan/cmv-app,roemhildtg/cmv-app,dyh333/cmv-app,ValueCreation/cmv-app,gavinr/cmv-app,coshx/cmv-app,tmcgee/cmv-app,tmcgee/cmv-app,cmv/cmv-app,kcsgisRham/cmv-app,cmv/cmv-app,dyh333/cmv-app,tduerkop/cmv-app,roemhildtg/cmv-app,fileunderjeff/cmv-app,ValueCreation/cmv-app,gdherbert/cmv-app,ebonan/cmv-app,gavinr/cmv-app,gdherbert/cmv-app,kcsgisRham/cmv-app