WIP - Make EL2 DPI changes and implement on Windows (#895)

* Modify DPI API publicly and on Windows

* Add generic Position and make dpi creation functions const

* Make examples work

* Fix fullscreen windows not appearing

* Replace Logical coordinates in window events with Physical coordinates

* Update HiDpiFactorChanged

* Document to_static

src/platform_impl/windows/dpi.rs

@@ -141,7 +141,3 @@ pub unsafe fn hwnd_dpi(hwnd: HWND) -> u32 {
         }
     }
 }
-
-pub fn hwnd_scale_factor(hwnd: HWND) -> f64 {
-    dpi_to_scale_factor(unsafe { hwnd_dpi(hwnd) })
-}