Improvements to `uc_gui_click_x_y(x, y)`

[mdmintz]

Improvements to uc_gui_click_x_y(x, y)

• Should adjust for Windows screen-scaling so that the location coordinates remain consistent, even if adjusting screen scale.
• Should save the screen-scaling factor once calculated to prevent repetitive work when performing multiple clicks.
• Should make sure the active window is on top before the click. (Prevent issues with multi-threading)
  --> (Note: On Windows, this means minimizing the window, and then un-minimizing it.)

[mdmintz]

This was resolved in 4.29.9 - https://github.com/seleniumbase/SeleniumBase/releases/tag/v4.29.9