Fix declaration-block-no-duplicate-properties (CSS)

src/elements/emby-button/emby-button.css

@@ -18,11 +18,9 @@
     padding: 0.9em 1em;
     vertical-align: middle;
     border: 0;
-    vertical-align: middle;
     border-radius: 0.2em;
     /* These are getting an outline in opera tv browsers, which run chrome 30 */
     outline: none !important;
-    position: relative;
     font-weight: 600;
     /* Disable webkit tap highlighting */
     -webkit-tap-highlight-color: rgba(0,0,0,0);
@@ -112,10 +110,8 @@
     padding: .556em;
     vertical-align: middle;
     border: 0;
-    vertical-align: middle;
     /* These are getting an outline in opera tv browsers, which run chrome 30 */
     outline: none !important;
-    position: relative;
     overflow: hidden;
     border-radius: 50%;
     /* Disable webkit tap highlighting */
@@ -169,7 +165,6 @@
 .filterButtonBubble {
     color: #fff;
     position: absolute;
-    background: #444;
     top: 0;
     right: 0;
     width: 1.6em;