Bug Fix: Check Box List script

Migrate from .attr() to .prop() as per: http://api.jquery.com/prop/

Disco.Web/ClientSource/Style/BundleSite.css

@@ -1522,6 +1522,11 @@ a:hover {
 a:active {
   color: #335a87;
 }
+a[disabled] {
+  color: #696969;
+  text-decoration: none;
+  cursor: default;
+}
 a.button {
   display: inline-block;
   padding: 4px 10px;

Disco.Web/ClientSource/Style/Site.css

@@ -344,6 +344,11 @@ a:hover {
 a:active {
   color: #335a87;
 }
+a[disabled] {
+  color: #696969;
+  text-decoration: none;
+  cursor: default;
+}
 a.button {
   display: inline-block;
   padding: 4px 10px;

Disco.Web/ClientSource/Style/Site.less

@@ -282,6 +282,12 @@ a {
     &:active {
         color: @HyperLinkColour;
     }
+
+    &[disabled] {
+        color: @ButtonBorderHoverColour;
+        text-decoration: none;
+        cursor: default;
+    }
 }
     // Anchor Tags (Button)
     a.button {