Added standard menu to select app used to send the link to share a file
Adding custom dialog to let the user choose what app should received a shared link [WIP]
Merge branch 'share_link__new_share' into share_link__new_share_menu
Added filtered chooser dialog for activities that can receive a link
Merge pull request #384 from owncloud/share_link__new_share_menu

Added custom menu to show apps able to receive a link, filtering out ownCloud