fix(meta): fix meta data saving issue requiring two clicks

[ysfscream]

PR Checklist

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What is the current behavior?

Issue Number

Example: #123

What is the new behavior?

This Pull Request resolves an issue where users must click the "Save" button twice to save meta data successfully. The changes in this PR streamline the process, allowing users to save the metadata with a single click and improve code readability and maintainability.

1. Refactored and introduced isValidProp() function for better code reusability.
2. Updated getHasMqtt5PropState() function to use isValidProp() and Object.values() for better performance and readability.
3. Modified saveMeta() function to update hasMqtt5Prop after calling updatePushProp().

Please describe the new behavior or provide screenshots.

Does this PR introduce a breaking change?

• Yes
• No

Specific Instructions

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