feat(APA): use json body instead of url params (#1120)

src/Dialogs/Composer/AttachmentsPageAttachment.vala

@@ -409,10 +409,20 @@ public class Tuba.AttachmentsPageAttachment : Widgets.Attachment.Item {
  // When editing, we can only update attachment metadata
  // with the whole post
  if (!edit_mode) {
+ var builder = new Json.Builder ();
+ builder.begin_object ();
+
+ builder.set_member_name ("description");
+ builder.add_string_value (alt_text);
+
+ builder.set_member_name ("focus");
+ builder.add_string_value ("%.2f,%.2f".printf (pos_x, pos_y));
+
+ builder.end_object ();
+
  new Request.PUT (@"/api/v1/media/$(id)")
  .with_account (accounts.active)
- .with_param ("description", alt_text)
- .with_param ("focus", "%.2f,%.2f".printf (pos_x, pos_y))
+ .body_json (builder)
  .then (() => {
  close_dialogs ();
  })