Also we try to connect signals to tools AFTER they started doing their job. This will not work for tasks that close immediately, e.g. "Scan for new items" on a very small collection. In this case the signal becomes connected AFTER the tool is done, therefore never executing the assigned slot. There are still some race conditions left, I need to check them, but for now the main issue in this bug report should be solved.

CCBUG: 297614