make the action buttons for rebaseline server stick to the top of the window as you scroll

gm/rebaseline_server/static/view.css

 /* Special alert areas at the top of the page. */
 .todo-div {
     background-color: #bbffbb;
 }
 .warning-div {
     background-color: #ffbb00;
 }
 
 .tab-wrapper {
     margin-top: 10px;
@@ skipping 50 matching lines @@
 .show-only-button {
     font-size: 8px;
 }
 .show-all-button {
     font-size: 8px;
 }
 
 .image-link {
     text-decoration: none;
 }
+
+.results-header {
+    overflow: hidden;
+    padding: 10px;
+    background-color: #ccccff;
+}
+
+.results-header-actions {
+    float: right;
+}
+
+.sticky {
+    position: fixed;
+    top: 2px;
+    box-shadow: -2px 2px 5px 0 rgba(0,0,0,.45);
+    background: white;
+    right: 2px;
+    padding: 10px;
+    border: 2px solid #222;
+}