Bug 442157 Set of the edit policies to support: 

- absolute bendpoints (stored as relative) to avoid being affected by
changes of other bendpoints
- improved snap-to-grid aware rectilinear routing
- snap-to-grid with scroll for XY-compartments

Change-Id: I10fe42b393cfaa94a205a5d1c650697eed7c7793
Signed-off-by: mgolubev <golubev@montages.com>
12 files changed