[FIX] report: boxed layout

In the footer of the boxed layout, the font-size used might lead to a
wrapping of the phone and VAT numbers.

opw-782639

addons/report/static/src/less/layout_boxed.less

@@ -15,6 +15,7 @@
     }
 }
 .o_boxed_footer {
+    white-space: nowrap;
     border-top: 3px solid @gray;
     ul {
         margin: 4px 0;