Bug 1144615 - 1 - Minor css fixes in animation panel; r=bgrins

The toolbar class was making the whole background of the animation panel
be grey, unlike the other inspector side-bar panels.
Also removed the unnecessary right-border on the global play/pause button.

browser/devtools/animationinspector/animation-inspector.xhtml

@@ -19,7 +19,7 @@
       <span class="label">&allAnimations;</span>
       <button id="toggle-all" standalone="true" class="devtools-button"></button>
     </div>
-    <div id="players" class="theme-toolbar"></div>
+    <div id="players"></div>
     <div id="error-message">
       <p>&invalidElement;</p>
       <p>&selectElement;</p>

browser/themes/shared/devtools/animationinspector.css

@@ -28,7 +28,7 @@ body {
 }
 
 #toggle-all {
-  border-width: 0px 1px;
+  border-width: 0 0 0 1px;
   min-height: 20px;
 }