Add in show-on-hover CSS classes

services/web/public/stylesheets/components/hover.less

@@ -0,0 +1,11 @@
+.hover-container {
+	.show-on-hover {
+		display: none;
+	}
+	
+	&:hover {
+		.show-on-hover {
+			display: initial;
+		}
+	}
+}

services/web/public/stylesheets/style.less

@@ -40,6 +40,7 @@
 // @import "components/wells.less";
 @import "components/close.less";
 @import "components/fineupload.less";
+@import "components/hover.less";
 
 // Components w/ JavaScript
 @import "components/modals.less";