Hide collaborative tag input when empty

[nickvergessen]

Checkbox 1.1 from #1465

@jancborchardt @MorrisJobke

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[mention-bot]

@nickvergessen, thanks for your PR! By analyzing the annotation information on this pull request, we identified @jancborchardt, @skjnldsv and @LukasReschke to be potential reviewers

[MorrisJobke]

Please add viewBox="0 0 16 16" for proper scaling in Firefox ;)

[nickvergessen]

Fixed

[MorrisJobke]

Tested and works (even if IE and Firefox) ;) 👍

[jancborchardt]

Two things we need to fix:

• »Tags« action should have some padding and space to the left to differentiate from file info
• when the input field shows, there is proper whitespace to the tab bar below. But the default state has insufficient whitespace.

[jancborchardt]

LGTM, now with proper padding!

@karlitschek Requesting backport since the tags field really really distracts from the Sharing input field, as confirmed by @schiessle, @oparoz and multiple others.

[karlitschek]

hmm. bigger change. but backport makes sense 👍