Responsive style update

git-svn-id: https://plugins.svn.wordpress.org/displet-property-showcase/trunk@861160 b8457f37-d9ea-0310-8a92-e5e31aec5664
Style improvements

git-svn-id: https://plugins.svn.wordpress.org/displet-property-showcase/trunk@861215 b8457f37-d9ea-0310-8a92-e5e31aec5664
Slideshow improvement

git-svn-id: https://plugins.svn.wordpress.org/displet-property-showcase/trunk@861231 b8457f37-d9ea-0310-8a92-e5e31aec5664