open port testings in new tab

network.html

@@ -97,14 +97,14 @@
           <li class="not-using-proxy" style="display:none;">
               <label>External Port 1 (TCP): </label>
               <span class="ext-port1"></span>
-              <a class="test-ext-port1">
+              <a class="test-ext-port1" target="_blank">
                  <button>Test open port (external site)</button>
               </a>
           </li>
           <li class="not-using-proxy" style="display:none;">
               <label>External Port 2 (TCP+UDP): </label>
               <span class="ext-port2"></span>
-              <a class="test-ext-port2">
+              <a class="test-ext-port2" target="_blank">
                  <button>Test open port (external site)</button>
               </a>
           </li>