I am able to reproduce the issue by reinstall JetBrains AppCode. The first time I open AppCode after reinstall it, AltTab never show AppCode window. I debug the code on my Mac, I find that AltTab can get the event of app launched but never get the event of finishedLaunching. So I just remove the code runningApplication.isFinishedLaunching. After that, AltTab work well and the issue is fixed.

workaround: sometimes some apps are launched and are actived but OS returns the windows.count == 0. we wait for a moment. For example: Bear.app. At this scenario, AXUIElementCopyAttributeValue(self, kAXWindowsAttribute, &value) returns success but  AXUIElementCopyAttributeValue(self, kAXPositionAttribute, &value) and AXUIElementCopyAttributeValue(self, kAXSizeAttribute, &value) return attributeUnsupported. After we wait for a moment, all things run well.

We use  `isManageable` to indicate the subscription will success or not. No need to subscribe to an app which is `LSBackgroundOnly` or `LSUIElement`.

…12.2

# Conflicts:
#	src/api-wrappers/AXUIElement.swift