Merge changes I651c570b,I0d571918

* changes:
  Switch padding to margin in header
  Fix Gerrit global scoping issue
diff --git a/polygerrit-ui/app/elements/core/gr-main-header/gr-main-header.html b/polygerrit-ui/app/elements/core/gr-main-header/gr-main-header.html
index fc81a2e..89b3548 100644
--- a/polygerrit-ui/app/elements/core/gr-main-header/gr-main-header.html
+++ b/polygerrit-ui/app/elements/core/gr-main-header/gr-main-header.html
@@ -53,7 +53,7 @@
         content: "";
         display: inline-block;
         height: var(--header-icon-size);
-        padding-right: calc(var(--header-icon-size) / 4);
+        margin-right: calc(var(--header-icon-size) / 4);
         vertical-align: text-bottom;
         width: var(--header-icon-size);
       }
diff --git a/polygerrit-ui/app/elements/gr-app.html b/polygerrit-ui/app/elements/gr-app.html
index 758add8..787a1c6 100644
--- a/polygerrit-ui/app/elements/gr-app.html
+++ b/polygerrit-ui/app/elements/gr-app.html
@@ -29,6 +29,7 @@
   // Needed for JSCompiler to understand it's global.
   // eslint-disable-next-line no-unused-vars, prefer-const
   let Gerrit = window.Gerrit || {};
+  window.Gerrit = Gerrit;
 </script>
 
 <link rel="import" href="../bower_components/polymer/polymer.html">
diff --git a/polygerrit-ui/app/embed/embed.html b/polygerrit-ui/app/embed/embed.html
index 647f602..be4e2f3 100644
--- a/polygerrit-ui/app/embed/embed.html
+++ b/polygerrit-ui/app/embed/embed.html
@@ -18,6 +18,7 @@
   // Needed for JSCompiler to understand it's global.
   // eslint-disable-next-line no-unused-vars, prefer-const
   let Gerrit = window.Gerrit || {};
+  window.Gerrit = Gerrit;
 </script>
 <link rel="import" href="../bower_components/polymer/polymer.html">
 <link rel="import" href="../elements/change/gr-change-view/gr-change-view.html">
diff --git a/polygerrit-ui/app/gr-diff/gr-diff-root.html b/polygerrit-ui/app/gr-diff/gr-diff-root.html
index 557f48b..132654c 100644
--- a/polygerrit-ui/app/gr-diff/gr-diff-root.html
+++ b/polygerrit-ui/app/gr-diff/gr-diff-root.html
@@ -2,5 +2,6 @@
   // Needed for JSCompiler to understand it's global.
   // eslint-disable-next-line no-unused-vars, prefer-const
   let Gerrit = window.Gerrit || {};
+  window.Gerrit = Gerrit;
 </script>
-<link rel="import" href="../elements/diff/gr-diff/gr-diff.html">
\ No newline at end of file
+<link rel="import" href="../elements/diff/gr-diff/gr-diff.html">