Update KVM layout and add open in new window functionality

-Adds heading with new layout consistency class name
-Adds open in new window functionality

Resolves: openbmc/phosphor-webui#81

Tested on a Witherspoon with power on and with build
that allows up to 4 kvm sessions connected
at a time https://gerrit.openbmc-project.xyz/c/openbmc/bmcweb/+/25231.

KVM console loads in firefox, chrome, safari, edge and IE11.
Opening new window and returning to parent window is
functional across all browsers.

Signed-off-by: Dixsie Wolmers <dixsiew@gmail.com>
Change-Id: I32cda025bdd459740ca2b42d573b431fac687860
diff --git a/app/server-control/controllers/kvm-window-controller.html b/app/server-control/controllers/kvm-window-controller.html
new file mode 100644
index 0000000..222d737
--- /dev/null
+++ b/app/server-control/controllers/kvm-window-controller.html
@@ -0,0 +1,8 @@
+<div class="kvm-window">
+  <div class="kvm__actions">
+    <button class="btn  btn-tertiary" ng-click="close()">
+      <icon file="icon-return.svg" aria-hidden="true"></icon>Return to OpenBmc
+    </button>
+  </div>
+  <kvm-console new-window-btn="false"></kvm-console>
+</div>