Updating the UI while converting databases to V5

[jda]

> Hi Ruslan,
> 
> i'm getting feedback from users whose dbs are being converted from 4.x to 5.x. It can take quite some time for large databases (minutes), and when the spinning wheel cursor appears they think my app has hung and force-quit. How can I put up a dialog that  shows the update is still working (e.g. a barber pole control)?
> 

Actually, a lot of that time may be spent in cloning (I clone a copy of the database before letting Valentina update it). The question still is -- how to manage the UI while cloning/updating a database so the user doesn't think it has hung?

Jon