Derive actions in Qt applications and enable SUTProcesses settings for multi-processes

[ferpasri]

1. Derive actions in Qt applications

• WindowInteractionState seems not a supported property for Qt applications
• In these cases, avoid marking Qt elements as "blocked"
• To avoid deriving actions in Qt elements outside the active Qt window, create the method isQtElementVisibleOnModalScreen when obtaining the state.

2. Enable SUTProcesses settings for multi-processes

• Add the SUTProcesses setting to the Advanced dialog to allow users a more manageable configuration for Desktop SUT multi-processes
• The new WinProcess implementation also allows executing a launcher .exe file and connecting to the configured multi-processes even if the launcher process finishes.

3. Remove old debugging code from the Windows StateFetcher class

[ramondevries]

Possible applications to test with:

OBS studio
WPS Office (Issue #371)
Libre office