If detach inspector palette after factory reset before inspector tour was initiated, then stuck in infinite loop
Steps to reproduce:
1. Do factory reset (mscore -F)
2. do all the default starting options
3. complete the welcome tour
4. detach inspector
Result: the inspector tour starts to run, but somehow clicking Next doesn't advance the tour, and we are stuck forever! Closing musescore via File->Quit or pressing the window's [x] is not possible because the tours are modal! Can only forcibly quit the application, such as by pressing Alt->F4.
This is what my screen shot looks like in this state: