SSH keys management

[Gerhut]

Frontend support for #1206

Additional Dashboard Configuration

A root restfulapi field is required for global database use.

restfulapi: http://restfulapi

clusters:
  Cluster-1:
    restfulapi: http://restfulapi

[coveralls]

Pull Request Test Coverage Report for Build 3604

• 62 of 65 (95.38%) changed or added relevant lines in 7 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.1%) to 93.687%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
src/dashboard/server/api/services/global.js	39	42	92.86%
<!--	Total:	62	65	95.38%	-->

Totals
Change from base Build 3584:	0.1%
Covered Lines:	926
Relevant Lines:	976

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💛 - Coveralls