Add Settings tab for Cluster page

[Gerhut]

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[coveralls]

Pull Request Test Coverage Report for Build 3566

• 35 of 35 (100.0%) changed or added relevant lines in 5 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.03%) to 93.555%

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Totals
Change from base Build 3565:	0.03%
Covered Lines:	862
Relevant Lines:	909

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💛 - Coveralls

[xudifsd]

Backend code ref:

• timeout #1147
• interactive gpus #1157
• scheduling policy #1142 #1177