Adding a 20px left and right margin to the delay, wait, and error screens.

close #1117

resources/static/dialog/css/popup.css

@@ -132,6 +132,9 @@ section > .contents {
     color: #777;
 }
 
+#wait .vertical, #error .vertical, #delay .vertical {
+    padding: 0 20px;
+}
 
 #formWrap {
     background-color: #fff;