disable user-input for Print Preview

Bug 120745 r=dcone sr=attinasi a=asa

layout/html/document/src/forms.css

@@ -397,6 +397,7 @@ input[type="submit"][disabled] {
 @media print {
   input, textarea, select, button {
     -moz-user-focus: none !important;
+    -moz-user-input: none !important;
   }
 
 }

layout/style/forms.css

@@ -397,6 +397,7 @@ input[type="submit"][disabled] {
 @media print {
   input, textarea, select, button {
     -moz-user-focus: none !important;
+    -moz-user-input: none !important;
   }
 
 }