Revert "Merge branch 'master' of https://github.com/pouzzler/IED-Logic-Simulator.git"

This reverts commit cce4e4d3fe65b629a9aa01e8fefc1b8f6dabfb78, reversing
changes made to 32909d95cd04049e62fcc73f377c585331c10422.
Revert "rename Plug.connect to Plug.connect_plugs to avoid conflits with Qt"

This reverts commit 32909d95cd04049e62fcc73f377c585331c10422.
reverted changes for a simpler wire coloring implementation