1. Finilazed the functionality to run instruments in the background from DaqMenu 2) Moved the identification of instruments from initInstrGui to runInstrument

Details:

1. MyCollector - fixed a minor buw with isrunning function and made the function deleteInstrument public so that it could be used in DaqMenu
2. DaqMenu - added updates of InstrList display in the collector tab when switching the tab or selection. Also added Delete instrument button.
3. MyDaq - added try-catch case in the destructor to prevent errors when attempting to delete Daq after the figure has been closed.