Adjust bg-image size/positioning when < 600px screenwidth
Adjust bg-image size/positioning when < 600px screenwidth

Background image height should be large enough to fill landing page heading

NestorSegura/operationcode_frontend,miaket/operationcode_frontend,OperationCode/operationcode_frontend,tal87/operationcode_frontend,tal87/operationcode_frontend,miaket/operationcode_frontend,tskuse/operationcode_frontend,hollomancer/operationcode_frontend,sethbergman/operationcode_frontend,tskuse/operationcode_frontend,miaket/operationcode_frontend,alexspence/operationcode_frontend,alexspence/operationcode_frontend,hollomancer/operationcode_frontend,NestorSegura/operationcode_frontend,OperationCode/operationcode_frontend,NestorSegura/operationcode_frontend,tskuse/operationcode_frontend,hollomancer/operationcode_frontend,alexspence/operationcode_frontend,sethbergman/operationcode_frontend,tal87/operationcode_frontend,sethbergman/operationcode_frontend,OperationCode/operationcode_frontend