Singnal node connection status can't be saved when copied and in schematics

[Cry0flu1d]

Describe the bug A clear and concise description of what the bug is.

when selects a region with block "Signal Node" and tries to copy it or save this as shematics, all of the connections of these nodes will be lost.

To Reproduce Steps to reproduce the behavior:

1. Place a few Signal Nodes
2. Select this region
3. Place the selected region

Expected behavior A clear and concise description of what you expected to happen. The connection status should be saved with schematics, like bridges and power nodes.