While saves fail the workspace turns read-only, but only some tools
checked it. Edits from the asset, color and token panels, and a drag or
a drawing in progress when the lock came, still made commits that
queued behind the failed save.
commit-changes refuses commits while the save-failure lock holds,
except those that are not user edits: the undo of rolled-back commits,
text position data and component touches. Undo and redo do nothing
while locked. When the lock comes, moves, resizes, rotations, drawings
and the drags of flex, guide and grid handles in progress are cancelled
and commit nothing, and the design panel shows the Inspect view.
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