Uniform size and positioning of all modals

lib/music_library_web/live/scrobble_rules_live/index.html.heex

@@ -101,8 +101,9 @@
 
 <.modal
   :if={@live_action in [:new, :edit]}
-  class="min-w-sm md:min-w-2xl max-w-3xl"
   id="scrobble_rule-modal"
+  class="md:min-w-2xl max-w-sm md:max-w-3xl mt-8"
+  placement="top"
   open
   on_close={JS.patch(~p"/scrobble-rules")}
 >