Make the new landing page handle the signed in user better

static/css/quay.css

@@ -1176,22 +1176,56 @@ i.toggle-icon:hover {
   display: none;
 }
 
+.landing {
+  position: relative;
+}
+
 .landing .popover {
   font-size: 14px;
 }
 
-.landing {
-  color: white;
+.landing-content {
+
+}
+
+.landing-background {
+  z-index: 0;
+
+  position: absolute;
+  top: 0px;
+  bottom: 0px;
+  left: 0px;
+  right: 0px;
 
   background-color: #1d1d1d;
   background-position: left -300px;
   background-image: url(../img/landing-back.jpg);
   background-repeat: no-repeat;
+}
+
+.landing-filter {
+  z-index: 0;
+
+  position: absolute;
+  top: 0px;
+  bottom: 0px;
+  left: 0px;
+  right: 0px;
+}
+
+.landing-filter.signedin {
+  background: rgba(0, 0, 0, 0.4);
+}
+
+.landing-content {
+  z-index: 2;
+}
+
+.landing {
+  color: white;
 
   margin-bottom: 0px;
-
   padding-top: 120px;
-
   min-height: 440px;
 }