FilterBar: conditional animation

Signed-off-by: marcin mikołajczak <git@mkljczk.pl>

app/styles/ui.scss

@@ -699,10 +699,13 @@ article:last-child > .domain {
     height: 3px;
     bottom: 0;
     background-color: var(--accent-color);
-    transition: all 0.3s;
   }
 }
 
+.no-reduce-motion .filter-bar__active {
+  transition: all 0.3s;
+}
+
 .reaction__filter-bar {
   overflow-x: auto;
   overflow-y: hidden;