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/styles/kvm.scss b/app/server-control/styles/kvm.scss
index 2f9e2c0..69fa62c 100644
--- a/app/server-control/styles/kvm.scss
+++ b/app/server-control/styles/kvm.scss
@@ -1,4 +1,3 @@
-
 .noNVC_shown {
   display: inline;
 }
@@ -9,3 +8,10 @@
 #noVNC_left_dummy_elem {
   flex: 1;
 }
+
+.kvm-window {
+  padding: 0 2rem;
+  .kvm__actions {
+    padding-bottom: 1.2rem;
+  }
+}