Dashboard: use Map instead of pure object in allowed IP page.

[Gerhut]

Using pure object as map has security issues if the cluster name is same as built-in methods' name.

[coveralls]

Pull Request Test Coverage Report for Build 3642

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 92.394%

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Totals
Change from base Build 3639:	0.0%
Covered Lines:	969
Relevant Lines:	1038

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💛 - Coveralls