Rethinking the "Update Available" window

[eisb]

The background:
When I open FileZilla, I have a specific task ahead of me and want to get it done as quickly as possible. Today I opened it and was faced with the "Update Available" window, so I clicked "Next" just to download the update so I could run it later. Unfortunately, I discovered I had to wait for the entire update process to complete before I could get on with my task.

The request:
I would love to see the "Update Available" window only show up when I shut FileZilla down, as then I could just let it go in the background since it wouldn't be interfering with what I originally opened the program to do. The same end would be achieved but would be less intrusive on the workflow of the user.

[codesquid]

In essence duplicate of  https://sourceforge.net/tracker/index.php?func=detail&aid=1896372&group_id=21558&atid=372244