Mobile: New alert info width fix (#63)

scss/main.scss

@@ -89,8 +89,10 @@ body:not(.has-full-page-chat) {
   }
 }
 
-.list-container {
+#list-area {
   .show-more.has-topics {
+    @include breakpoint(medium, $rule: min-width) {
+      width: auto;
       right: 50%;
       transform: translateX(50%);
 
@@ -100,6 +102,7 @@ body:not(.has-full-page-chat) {
         font-size: var(--font-down-1-rem);
       }
     }
+  }
   .topic-list-body {
     padding-top: var(--spacing-block-m);
   }