GUAC-545: Add reconnect button and countdown.

guacamole/src/main/webapp/styles/client.css

@@ -283,11 +283,21 @@ div#viewportClone {
     margin-bottom: 0.5em;
 }
 
-.dialog .status {
+.dialog .status, .dialog .countdown, .dialog .reconnect {
+    margin: 0;
     padding: 0.5em;
     font-size: 0.8em;
 }
 
+.dialog .reconnect {
+    display: none;
+}
+
+.guac-error .dialog .reconnect {
+    display: block;
+    text-align: center;
+}
+
 p.hint {
     
     border: 0.25em solid rgba(255, 255, 255, 0.25);