Qt Maintenance Tool: Unnecessary interruption on "network reset by peer"

In case of a network connectivity issue, the Qt Maintenance Tool interrupts an ongoing installation immediately and requires the user to hit either the "Retry" or "Cancel" button. Retrying solves the problem in almost all cases.

When installing Qt during rush hours a network reset by peer, firewall or a simple connection error can occur multiple times easily. Hitting "Retry" makes the installation continue and solves the issue almost always. In the course of a rush our new installation, the user can be required to hit "Retry" more than 100 times.

A decent number of automatic retries should be implemented, to require the least possible amount of pointless user interactions.When installing Qt with the maintenance tool during rush hours, the network connection can get randomly interrupted, reset by peer or outgoing firewall.