Fix: Ctrl+Z on 'Edit > Convert to Infinite Canvas' creates leftover merge nodes#3548

Annonnymmousss wants to merge 2 commits intoGraphiteEditor:masterGraphiteEditor/Graphite:masterfrom

Annonnymmousss:fix_leftover-merge-nodesAnnonnymmousss/Graphite:fix_leftover-merge-nodesCopy head branch name to clipboard