GUAC-932: Fix button style.

guacamole/src/main/webapp/app/index/styles/buttons.css

@@ -20,13 +20,17 @@
  * THE SOFTWARE.
  */
 
+a.button {
+    cursor: default;
+    display: inline-block;
+}
+
 input[type="submit"], button, a.button {
     
     -webkit-appearance: none;
     text-decoration: none;
 
     background-color: #3C3C3C;
-
     border: 1px solid rgba(0, 0, 0, 0.4);
 
     color: white;
@@ -39,7 +43,6 @@ input[type="submit"], button, a.button {
     min-width: 5em;
     margin: 0.25em;
 
-    border-bottom: rgba(0, 0, 0, 0.25);
     box-shadow: 0 1px 2px rgba(0, 0, 0, 0.25);
 
 }
@@ -70,10 +73,6 @@ button.danger:active, a.button.danger:active {
     background: #932;
 }
 
-a.button {
-    display: inline-block;
-}
-
 .button.logout, .button.manage, .button.back {
     background-repeat: no-repeat;
     background-size: 1em;