Share sheet improvements (external sharing)

[ChrisEdS]

Description

To make the view of public links look syncron to the view of internal links I created this PR.

This PR contains:

• Color of the separator line has the same color
• The padding of the icons has been enlarged
• A background color was inserted
• The padding of the content was increased on the left and right

Related Issue

• Fixes https://github.com/owncloud/enterprise/issues/3979

Motivation and Context

To make the view of public links look syncron to the view of internal links

How Has This Been Tested?

• Manually tested in Firefox and Chrome

Screenshots:

Before	After

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Database schema changes (next release will require increase of minor version instead of patch)
• Breaking change (fix or feature that would cause existing functionality to change)
• Technical debt
• Tests only (no source changes)

Checklist:

• Code changes
• Unit tests added
• Acceptance tests added
• Documentation ticket raised:
• Changelog item, see TEMPLATE

[codecov]

Codecov Report

Merging #37558 into master will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##             master   #37558   +/-   ##
=========================================
  Coverage     64.66%   64.66%           
  Complexity    19343    19343           
=========================================
  Files          1279     1279           
  Lines         75600    75600           
  Branches       1333     1333           
=========================================
  Hits          48885    48885           
  Misses        26323    26323           
  Partials        392      392           

Flag	Coverage Δ	Complexity Δ
#javascript	54.03% <ø> (ø)	0.00 <ø> (ø)
#phpunit	65.83% <ø> (ø)	19343.00 <ø> (ø)

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[phil-davis]

Looks consistent now:

Note: When a share is with a user that has a long display name, or a group that has a long name, then the name automagically drops down under the avatar icon.

For a public link with a long description, that does not happen. But that was also the previous behavior, not something new with this PR. If it is easy to adjust, then that behavior could also be made consistent in a next PR @ChrisEdS

[ChrisEdS]

For a public link with a long description, that does not happen. But that was also the previous behavior, not something new with this PR. If it is easy to adjust, then that behavior could also be made consistent in a next PR

Yes, that was what I thought. I will have a look.