[Enhancement] Add "Copy JSON" action button to help when troubleshooting (#224)

* [WIP] [skip ci]

* Added 'copy JSON' button to all dropdowns; hopefully fixed some CSS silliness

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

@@ -6,7 +6,7 @@
 </div>
 
 <div class="rounded-sm border border-stroke bg-white px-5 pb-2.5 pt-6 shadow-default dark:border-strokedark dark:bg-boxdark sm:px-7.5 xl:pb-1">
-  <div class="max-w-full overflow-x-auto">
+  <div class="max-w-full">
     <div class="flex flex-col gap-10">
       <.source_form changeset={@changeset} media_profiles={@media_profiles} action={~p"/sources"} />
     </div>