reduce share action text to the user name only
remove dead code

do not filter groups. but update the user count according to the filter

improve phpdoc

improve metadata runtime cache

add metadata tests
fixing PHPDoc
Merge pull request #9562 from owncloud/users-groupfilter

Do not filter groups, but therefore update the user counts according to  the filter
[tx-robot] updated from transifex
Merge pull request #9596 from owncloud/fixing-9503-master

reduce share action text to the user name only