wip

- Post preview is wider when look at the list of posts
- Hide the topic navigation that is useless on mobile

mobile/mobile.scss

@@ -80,6 +80,10 @@ html body.staff:not(.navigation-topics) #main-outlet {
   margin-bottom: 0;
 }
 
+html body.navigation-category #main-outlet {
+  width: calc(100% - 1em);
+}
+
 .container.posts > .row {
   max-width: calc(100vw - 1.5em);
 }