FIX: out of range exception when pressing undo after creating and editing a new control scheme (ISXB-1607) #2237

Darren-Kelly-Unity merged 14 commits intodevelopUnity-Technologies/InputSystem:developfrom

bugfix/ISXB-1607-null-ref-with-undo-when-editing-new-controlschemeUnity-Technologies/InputSystem:bugfix/ISXB-1607-null-ref-with-undo-when-editing-new-controlschemeCopy head branch name to clipboard