Fixing issue with Observation Syncing Save Button not showing up.

[zrm22]

Description

Provide a summary of your changes including motivation and context.
If these changes fix a bug or resolves a feature request, be sure to link to that issue.

Type of change

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• CHANGE (fix or feature that would cause existing functionality to not work as expected)
• FEATURE (non-breaking change which adds functionality)
• BUGFIX (non-breaking change which fixes an issue)
• ENHANCEMENT (non-breaking change which improves existing functionality)
• NONE (if none of the other choices apply. Example, tooling, build system, CI, docs, etc.)

Checklist:

• I have performed a self-review of my code
• I have commented my code, particularly in hard-to-understand areas
• I have updated relevant documentation

Changelog entry

Fixes #648. Observation sync code no longer hangs.

Now correctly displays the Save Button once the requested pages have all been downloaded.