Don't crash if no element has keyboard focus when trying to type into control.
IsKeyboardFocused, test on TextBox.
IsKeyboardFocused, test on RadioButtons.
Test IsKeyboardFocused when changing tab.
Moved screen capture from exception class to new Screen class so that it can be used in other places. Renamed Input folder to Hardware since Screen is also in there.
Capture screen on failed NUnit assertion.
Simpler ToolTip interface. No need to find with By since there's always only one tooltip.
Support Content in tooltip.
Separate method for retrieving ToolTips specified as strings. Changes in Mouse interface to allow clicking on IClickable classes.