MP-104 fix icon on collapsible

Author: kkartunov

src/libs/ui/lib/components/collapsible/Collapsible.module.scss

@@ -19,6 +19,11 @@
 
         .btn {
             padding-right: 0;
+
+            svg {
+                width: 24px;
+                height: 24px;
+            }
         }
     }