Set timestamps for system messages

Previously system messages were always added to the end of the chat,
even if the message triggering them was sent earlier.  This is
especially important for messages about disappearing timer reset
triggered by classic email messages, as they should be placed right
after the message resetting the timer.

src/dc_receive_imf.rs

@@ -798,6 +798,12 @@ async fn add_parts(
 
     let location_kml_is = mime_parser.location_kml.is_some();
 
+    // correct message_timestamp, it should not be used before,
+    // however, we cannot do this earlier as we need from_id to be set
+    let in_fresh = state == MessageState::InFresh;
+    let rcvd_timestamp = time();
+    let sort_timestamp = calc_sort_timestamp(context, *sent_timestamp, chat_id, in_fresh).await?;
+
     // Apply ephemeral timer changes to the chat.
     //
     // Only non-hidden timers are applied now. Timers from hidden
@@ -825,6 +831,7 @@ async fn add_parts(
                 context,
                 chat_id,
                 stock_ephemeral_timer_changed(context, ephemeral_timer, from_id).await,
+                sort_timestamp,
             )
             .await;
         }
@@ -868,6 +875,7 @@ async fn add_parts(
                             context,
                             chat_id,
                             format!("Cannot set protection: {}", e),
+                            sort_timestamp,
                         )
                         .await;
                         return Ok(chat_id); // do not return an error as this would result in retrying the message
@@ -883,12 +891,6 @@ async fn add_parts(
         }
     }
 
-    // correct message_timestamp, it should not be used before,
-    // however, we cannot do this earlier as we need from_id to be set
-    let in_fresh = state == MessageState::InFresh;
-    let rcvd_timestamp = time();
-    let sort_timestamp = calc_sort_timestamp(context, *sent_timestamp, chat_id, in_fresh).await?;
-
     // Ensure replies to messages are sorted after the parent message.
     //
     // This is useful in a case where sender clocks are not