Can't close standalone window when pressing X with touch input. Regression from 4.6 version.

Reproducible on 5.x versions with any device using touchscreen;

Repro steps:
1. open project "case_640216-modified.zip";
2. build Win standalone with 4.6 and 5.x versions;
3. Standalone built with Unity 5.x doesn't react to touch input, when you want to close the window by pressing X;

Workaround: use physical mouse or close application from taskbar;

Fixed in 5.0.1p4 version;