uploads: allow changing thumbnail size on My Uploads / All Uploads pages.

* Add a "Size" menu to the My Uploads / All Uploads pages to allow
  changing the thumbnail size.
* Make the My Uploads / All Uploads pages use the same thumbnail size as
  the post index page.
* Change the "Gallery | Table" links on the My Uploads page to icons.

app/javascript/src/javascripts/preview_size_menu_component.js

@@ -0,0 +1,20 @@
+import Cookie from './cookie';
+
+export default class PreviewSizeMenuComponent {
+  static initialize() {
+    $(document).on("click.danbooru", ".preview-size-menu .popup-menu-content a", e => PreviewSizeMenuComponent.onClick(e));
+  }
+
+  static onClick(e) {
+    let url = new URL($(e.target).get(0).href);
+    let size = url.searchParams.get("size");
+
+    Cookie.put("post_preview_size", size);
+    url.searchParams.delete("size");
+    location.replace(url);
+
+    e.preventDefault();
+  }
+}
+
+$(PreviewSizeMenuComponent.initialize);