2616: Save Scheduled Time for Drafts. (#2624)

* 2616: Save Scheduled Time for Drafts.

Signed-off-by: Martin Marconcini <martin.marconcini.rodriguez@nl.abnamro.com>

* Revert 39.json schema to the original state before my changes.

app/src/main/java/com/keylesspalace/tusky/service/SendStatusService.kt

@@ -257,7 +257,8 @@ class SendStatusService : Service(), Injectable {
             mediaUris = status.mediaUris,
             mediaDescriptions = status.mediaDescriptions,
             poll = status.poll,
-            failedToSend = true
+            failedToSend = true,
+            scheduledAt = status.scheduledAt
         )
     }