draw critical path contour doesn't work with "crit path routing" drawing mode

[w0lek]

Draw critical path contour works with "crit path flylines" mode, and don't work with "crit path routing".
The problem: drawing style for contour matches to drawing style of regular critical path primitive.

Expected Behaviour

Only selected critcal path elements must be highlighted. If drawing contour is enabled, the rest(not selected) of critical path elements will be drawn with half transparent grey-scaled style.

Current Behaviour

If we enable drawing contour for "crit path routing" and select only few elements of certain critical path, we still see whole critical path highlighted, which negated original meaning of drawing contour.

Possible Solution

Use contour drawing style differ to normal drawing style for "crit path routing" in render function.

Steps to reproduce

The issue is reproduced as part of using IPA feature inside Aurora software which uses vpr viewer for visualization.
It is also to reproduce it using IPAClient.

• run iPAClient
• checked in "contour mode" in configuration (by default is on)
• select "crit path routing" mode in drop down of configuration widget.
• click "Done"
• select several critical path elements (not selected elements will be still drawn with regular drawing style, which isn't ok)