Use .png Plex logo instead of .svg

* Fix .svg not showing on some devices

data/interfaces/default/css/plexpy.css

@@ -1101,7 +1101,7 @@ a:hover .dashboard-recent-media-cover {
     display: block;
     width: 100%;
     height: 100%;
-    background-image: url(../images/plex-logo-light.svg);
+    background-image: url(../images/plex-logo-light-small.png);
     background-size: 100px;
     background-repeat: no-repeat;
     background-position: center;