[Enhancement] Improve layout of media item page on large displays (#192)

* Improved layout of media items page

* Removed useless anchor tag

lib/pinchflat_web/controllers/sources/source_html/show.html.heex

@@ -23,9 +23,9 @@
         <.actions_dropdown source={@source} conn={@conn} />
       </:tab_append>
 
-      <:tab title="Attributes">
+      <:tab title="Source">
         <div class="flex flex-col gap-10 text-white">
-          <h3 class="font-bold text-lg">Attributes</h3>
+          <h3 class="font-bold text-xl mt-6">Raw Attributes</h3>
           <section>
             <strong>Media Profile:</strong>
             <.subtle_link href={~p"/media_profiles/#{@source.media_profile_id}"}>