Updating button and signin style.

client/coral-embed-stream/style/default.css

@@ -17,17 +17,16 @@ body {
 }
 
 button {
-  padding: 5px 10px;
   margin: 5px 10px 5px 0px;
   background: none;
+  padding: 0px;
   border: none;
   font-size: inherit;
 }
 
 button:hover {
   border-radius: 2px;
-  color: #FFF;
-  background-color: rgb(155, 155, 155);
+  color: #767676;
 }
 
 button i {
@@ -66,6 +65,10 @@ hr {
     color: #FFF;
 }
 
+#coralSignInButton:hover {
+  background-color: #767676;
+}
+
 /* Info Box Styles */
 .coral-plugin-infobox-info {
   top: 0;