When physical mouse is connected to touchscreen device, it goes to "PC" mode.
Selecting input field with touch input, touchscreen keyboard appears. Focus from input field takes off only when selecting UI button or slider. Focus doesn't take off when selecting an empty area.

Focus should go off always, when tapping beyond input field's area;

Reproducible on 4.6.0RC1;

Repro steps:
1. open project "UIrc1Project";
2. build to Win Store Apps platform;
3. with connected mouse, select input field with touch input in scene called "Controls". Now try to take off the focus from the input field;