Use namespace defined in kubeconfig as default in install view (#99)

* respect defualt namespace from kubeconfig

* respect defualt namespace from kubeconfig

* Replace exists with available - avoid confusion in status

* use data attribute

* remove commented line

* fix

pkg/dashboard/static/scripts.js

@@ -4,10 +4,10 @@ $(function () {
         window.location.href = "/#context=" + clusterSelect.find("input:radio:checked").val()
         window.location.reload()
     })
-
     $.getJSON("/api/kube/contexts").fail(function (xhr) {
         reportError("Failed to get list of clusters", xhr)
     }).done(function (data) {
+        $("body").data("contexts", data)
         const context = getHashParam("context")
         data.sort((a, b) => (getCleanClusterName(a.Name) > getCleanClusterName(b.Name)) - (getCleanClusterName(a.Name) < getCleanClusterName(b.Name)))
         fillClusterList(data, context);