improved the default datalink viewer

[agy-why]

improve the datalink viewer:

• less technical (hide non-necessary datalink columns)
• human readable file size

[coveralls]

Pull Request Test Coverage Report for Build 4008144258

• 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 64.201%

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Totals
Change from base Build 3995188500:	0.0%
Covered Lines:	4652
Relevant Lines:	7246

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💛 - Coveralls