建议增加MiddlePressMouse、MiddleReleaseMouse、MiddleDragDrop方法

[Harry2010410]

建议大佬，审阅增加以下封装方法，多谢啦！
uiautomation line1916 增加鼠标中键按压释放方法MiddlePressMouse、MiddleReleaseMouse
line2010增加拖移中键方法MiddleDragDrop

def MiddlePressMouse(x: int, y: int, waitTime: float = OPERATION_WAIT_TIME) -> None:
"""
Press middle mouse.
x: int.
y: int.
waitTime: float.
"""
SetCursorPos(x, y)
screenWidth, screenHeight = GetScreenSize()
mouse_event(MouseEventFlag.MiddleDown | MouseEventFlag.Absolute, x * 65535 // screenWidth, y * 65535 // screenHeight, 0, 0)
time.sleep(waitTime)

def MiddleReleaseMouse(waitTime: float = OPERATION_WAIT_TIME) -> None:
"""
Release middle mouse.
waitTime: float.
"""
x, y = GetCursorPos()
screenWidth, screenHeight = GetScreenSize()
mouse_event(MouseEventFlag.MiddleUp | MouseEventFlag.Absolute, x * 65535 // screenWidth, y * 65535 // screenHeight, 0, 0)
time.sleep(waitTime)

def MiddleDragDrop(x1: int, y1: int, x2: int, y2: int, moveSpeed: float = 1, waitTime: float = OPERATION_WAIT_TIME) -> None:
"""
Simulate mouse middle button drag from point x1, y1 drop to point x2, y2.
x1: int.
y1: int.
x2: int.
y2: int.
moveSpeed: float, 1 normal speed, < 1 move slower, > 1 move faster.
waitTime: float.
"""
MiddlePressMouse(x1, y1, 0.05)
MoveTo(x2, y2, moveSpeed, 0.05)
MiddleReleaseMouse(waitTime)

@yinkaisheng