Fix no sync on Save after explicit Sync

- If file opened via `Open from Crowdin` or from cache
- Also as side effect to the case 3/4 of vslavik#641 (comment)
  (but IMO it's really very useful feature/addition)
  if `Sync` button was pressed at least once in above case - it means that customer intetned to
  sync that file with Crowdin so all futher `Save` will upload that file
  to Crowdin

src/edframe.cpp

@@ -1865,6 +1865,7 @@ void PoeditFrame::OnUpdateFromCrowdin(wxCommandEvent&)
         EnsureAppropriateContentView();
         NotifyCatalogChanged(m_catalog);
         RefreshControls();
+        m_catalog->AttachCloudSync(std::make_shared<CrowdinSyncDestination>());
     });
 }