Show tha copy share link button properly inline

[MorrisJobke]

Before:

After:

cc @nextcloud/designers

[MorrisJobke]

To test this you need to enable one of the social sharing apps.

[codecov]

Codecov Report

Merging #7476 into master will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##             master    #7476   +/-   ##
=========================================
  Coverage     51.11%   51.11%           
  Complexity    24901    24901           
=========================================
  Files          1601     1601           
  Lines         94773    94773           
  Branches       1367     1367           
=========================================
  Hits          48440    48440           
  Misses        46333    46333

Impacted Files	Coverage Δ	Complexity Δ
lib/private/Security/CertificateManager.php	91.08% <0%> (-1%)	39% <0%> (ø)
apps/files_trashbin/lib/Trashbin.php	72.28% <0%> (-0.25%)	136% <0%> (ø)
lib/private/Server.php	81.01% <0%> (+0.11%)	134% <0%> (ø)	⬇️
apps/files_trashbin/lib/Expiration.php	91.93% <0%> (+1.61%)	29% <0%> (ø)	⬇️