0031440: Visualization - Impossible to make common behaviour for multi-selection...

0031440: Visualization - Impossible to make common behaviour for multi-selection in viewer

A special mode for the selecting by polygon is added to select only completely overlapping objects.

In order to track the sensitives that were included completely by defined polygon, the boundary points of the polygonal frustrum are stored in the variable myBoundaryPoints.

If an sensitive intersects with at least one of the frustrums from myFrustums, then checking whether this object intersects with borders using the isIntersectBoundary method; if not, then the sensitive were included completely by defined polygon.

Because the polygon can be concave, then to check the sensitive were included completely by defined polygon, it is not enough to check of all its points, it is necessary that the edges of the sensitive do not intersect polygonal frustrum. To do this, for polygonal selection, a call to the Overlaps method for a point was replaced by a call to a segment where necessary.

bugs/vis/bug31440: test case added