Fixed saving drafts with selected identity

app/src/main/java/eu/faircode/email/DaoIdentity.java

@@ -48,6 +48,9 @@ public interface DaoIdentity {
     @Query("SELECT * FROM identity WHERE id = :id")
     LiveData<EntityIdentity> liveIdentity(long id);
 
+    @Query("SELECT * FROM identity WHERE account = :account AND `primary`")
+    EntityIdentity getPrimaryIdentity(long account);
+
     @Insert
     long insertIdentity(EntityIdentity identity);