NVDAObjects/UIA: detect more dilaogs using class names and IsDialog property in Windows 10 RS5. Re #8405.
Instead of looking up only three class names, look up more via:
* Additional class names found in Windows 10 and various apps.
* In RS5, IsDialog property.
This allows dialogs such as app uninstlal dialog and many others to be recognized and their contents read by NVDA.