File access control omits now access to owner control.
Checking if we have an owner before using it.
fixes: invalid link in admin footer
Merge pull request #478 from Srokap/admin_footer_link

fixes: invalid link in admin footer
Prevent distortion of group icon
Prevent distortion of image
Merge branch '1.8' of github.com:Elgg/Elgg into 1.8
Merge pull request #472 from sembrestels/groups-summary-owner

Checking if we have an owner in group profile summary before using it.
Merge pull request #412 from Srokap/filestore_loose_owner_control

Don't let owner visibility prevent access to otherwise visible files. (Grabbing owner guid instead of owner entity to build file matrix in getFilenameOnFilestore())