Profile Completion 1.7.2 — Save bar fixes

A small maintenance release for Profile Completion.

The Save bar no longer depends on JavaScript. The floating Save pill only appeared once JavaScript had run, which could leave an admin settings form with no reachable submit button at all. There's now a plain fallback submit that always works.

"Unsaved changes" stops interrupting a save in progress. The post-submit latch cleared after 4 seconds, so on a slower save the warning would reappear mid-flight and swallow the "Saved" confirmation. That window is now 20 seconds.

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