eliminate horizontal scroll caused by footer (#9669)

web_src/less/_base.less

@@ -774,6 +774,7 @@ footer {
     .container {
         width: 100vw !important;
         padding: 0 0.5rem;
+        max-width: calc(100vw - 1rem) !important;
 
         .fa {
             width: 16px;