Prevent duplicated stack rows by changing how widget values are serialized and restored. Adds a ROW_FORMAT marker and LEGACY_BUTTON_SLOTS constant, stamps the node.properties with the new format, and introduces isRowValue for robust row detection. Marks the Add/Balance/Restore buttons as non-serializing and tags the add button with h3Role so rows insert correctly. onConfigure now recognizes legacy saved arrays (trims trailing button slots) and migrates them to the new format when loading. This fixes the bug where saved workflows would repeatedly grow extra rows on load/clone.
doggeddalle
92f634ccfd