pywinauto: target position is wrong for _perform_click in some cases

Expected Behavior

pywinauto.controls.hwndwrapper._perform_click should simulate the click behavior correctly.

Actual Behavior

when the “Dispaly -> Scale and layout -> Change the size of text, apps and other items” setting for windows 10 OS is NOT 100%， the target position of pywinauto.controls.hwndwrapper._perform_click may need to be adjusted according to the scale ratio.

Steps to Reproduce the Problem

1. set “dispaly -> scale and layout -> change the size of text, apps and other items” to be 200%

2. use pywinauto with win32 backend to get an item from a SysTreeView32 control in an app ，and then call the click() method for this item

Short Example of Code to Demonstrate the Problem

            tree_view = app.top_window().child_window(
                control_id=129, class_name="SysTreeView32"
            )
            target_item = tree_view.wrapper_object().get_item(['query','target'])
            target_item.click()

A raw method to solve this problem

1. add import win32print into hwndwrapper.py

2. insert the following code into pywinauto.controls.hwndwrapper._perform_click near line 1663 in hwndwrapper.py

    scale_ratio = win32print.GetDeviceCaps(win32gui.GetDC(ctrl.handle), win32con.LOGPIXELSX) / 96
    if scale_ratio != 1.0:
        coords = [int(item*scale_ratio) for item in coords]

after

    if absolute:
        coords = ctrl.client_to_screen(coords)

Relevent Problem

pywinauto.mouse._perform_click_input may also need to be adjusted.

Specifications

• Pywinauto version: 0.6.8
• Python version and bitness: 3.7
• Platform and OS: windows 10