When a row other then the last got removed from a model, the widgets that are created by the itemdelegate are not moved. This is obviously a big problem when you start removing rows in between. The wrong widgets will show up in the wrong rows. This also happens when you insert a new row instead of appending it.

This patch will update the widgets position of the rows that come behind the one that is inserted/removed. I also had to change QModelIndex to QPersistentModelIndex at one place because the modelindex changes when your remove/insert a row in the middle and new widgets would get created.

*Compiling
*Insert a row at the start/in the middle/at the end
*Remove a row at the start/in the middle/at the end

Everything seems to work now.