add a progress bar for scans at the bottom of the gui

[rpeltekov]

right now we are essentially relying on the output to the console on whether the scans are actually going as planned. add a little progress bar or something somewhere to the gui such that you can see the progress of the scan / operation of the button that you clicked, which made every other button grey out.

[rpeltekov]

probably need to pay attention to the number of scans necessary and count it somehow? maybe take this as a chance to clean up how all the different scans wait for the scans to complete...