Fix the Path tool adding a Path node but not applying the change until a second attempt due to wrong segment IDs#3727

Keavon merged 3 commits intoGraphiteEditor:masterGraphiteEditor/Graphite:masterfrom

Ayush2k02:fix-segment-ids-without-path-nodeAyush2k02/Graphite:fix-segment-ids-without-path-nodeCopy head branch name to clipboard