Lower Active alerts (#1789)

When an alert is lowered it is not reflected in the IML GUI.

This is because we need to call `update_activity_health` in the
`Msg::RemoveRecord` variant.

Signed-off-by: Joe Grund <jgrund@whamcloud.io>

iml-gui/crate/src/lib.rs

@@ -531,6 +531,16 @@ pub fn update(msg: Msg, model: &mut Model, orders: &mut impl Orders<Msg, GMsg>)
                         .proxy(page::filesystem::Msg::Stratagem)
                         .send_msg(stratagem::Msg::CheckStratagem);
                 }
+                warp_drive::RecordId::ActiveAlert(_) => {
+                    let old = model.activity_health;
+                    model.activity_health = update_activity_health(&model.records.active_alert);
+
+                    orders.proxy(Msg::Notification).send_msg(notification::generate(
+                        None,
+                        &old,
+                        &model.activity_health,
+                    ));
+                }
                 _ => {}
             }
         }