ALL: Added getMonitor() as alias for getDisplay()
LINUX: Added ewmhlib as separate module. Fixed getAllMonitors() returns empty list if XDG_CURRENT_DESKTOP is not set. Improved getClientFrame() and getExtraFrameSize() by properly using _NET_EXTENTS and GTK_EXTENTS, Added a new Window.LEGACY_NAME="WM_NAME" property (for apps not setting _NET_WM_NAME)
MACOS: Removed MacOSNSWindow. Fixed lowerWindow(), raiseWindow() and isAlive. Fixed test_pywinctl.py to avoid crashing in small screens