Review fix-ups on #11249 after merging main:
- A midpoint outside 5..95 %, transparency stops out of range or out of
order, and a Gradient Fill Set without transparency stops stay
reference-application steps instead of playing clamped or keeping the
layer's own transparency.
- An inverted Blend If range stays a reference-application step; the
command rejects it at play.
- The Layer Style dialog's OK records `Lefx` = {Scl} beside Blend If on a
layer without effects (measured). That Set is still the dialog's one
step and saves back with the `Lefx` it was recorded with.
Co-Authored-By: NaufalDzz <90562913+NaufalDzz@users.noreply.github.com>
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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