Add Copy Link to the dropdown 3-dots menu of the Files app

[ostasevych]

Sharing, copying and sending links to files via common messengers/email could be of one of the usual cases of handling files in webUI.

Please, add the appropriate menu item to the dropdown menu under 3 dots "..." in the Files app to copy a link to the file to the memory similar to the desktop client, which already has had this feature.