Added AIS_DragAction_Confirmed drag action, which will be called by AIS_ViewController when the drag interaction is confirmed (mouse moved more than click threshold).
Added AIS_ViewController::MouseSelectionSchemes() property defining map of selection schemes for mouse+modifier combinations.
IsXOR flag has been replaced by AIS_SelectionScheme in interfaces.
Rubber-band selection with Shift key pressed now applies XOR selection scheme in in Draw Harness.
Command vselect has been extended to specify selection scheme by name.
ViewerTest_EventManager now inherits AIS_ViewController.
Platform-dependent user input handling within ViewerTest has been revised
to process events in common way through AIS_ViewController.
The mouse navigation has been changed, so that left mouse clicked
without modifers now rotates View.
The rubber-band selection can be activated via Alt+LeftMouseButton.
Selection is now done on mouse unclick and keyboard short-cuts take effect on unclick.
Aspect_Window::SetTitle() - added new method configuring Window title.
Introduced new types Aspect_Touch, Aspect_VKey, Aspect_ScrollDelta
for processing window events in platform-independent way.
