fix: LSDV-5262: Save draft on postpone (#1447)

Author: hlomzik

src/stores/Annotation/Annotation.js

@@ -664,7 +664,7 @@ export const Annotation = types
       onSnapshot(self.areas, self.autosave);
     }),
 
-    saveDraft() {
+    saveDraft(params) {
       // if this is now a history item or prediction don't save it
       if (!self.editable) return;
 
@@ -677,7 +677,7 @@ export const Annotation = types
       self.versions.draft = result;
       self.setDraftSaving(true);
 
-      self.store.submitDraft(self).then(self.onDraftSaved);
+      return self.store.submitDraft(self, params).then(self.onDraftSaved);
     },
 
     saveDraftImmediately() {

src/stores/AppStore.js

@@ -726,12 +726,9 @@ export default types
     async function postponeTask() {
       const annotation = self.annotationStore.selected;
 
-      if (!annotation.versions.draft) {
-        // annotation created from prediction, so no draft was created
-        annotation.versions.draft = annotation.versions.result;
-      }
-
-      await self.submitDraft(annotation, { was_postponed: true });
+      // save draft before postponing; this can be new draft with FF_DEV_4174 off
+      // or annotation created from prediction
+      await annotation.saveDraft({ was_postponed: true });
       await getEnv(self).events.invoke('nextTask');
     }