Hide tinker mode button using CSS. Resolves GH-1725
Hide tinker mode button using CSS. Resolves GH-1725

rodmoreno/webmaker-android,alicoding/webmaker-android,gvn/webmaker-android,bolaram/webmaker-android,j796160836/webmaker-android,mozilla/webmaker-android,alanmoo/webmaker-android,adamlofting/webmaker-android,k88hudson/webmaker-android,mozilla/webmaker-android,alicoding/webmaker-android,gvn/webmaker-android,k88hudson/webmaker-android,alanmoo/webmaker-android,bolaram/webmaker-android,rodmoreno/webmaker-android,j796160836/webmaker-android