[QA] shared file viewed in 'shared with me' fails with 404

[jnweiger]

Seen with cloud.owncloud.com and new Web UI

• user S shares a *.docx file with user J
• user J looks in his shares -> shared with me, sees the file.
• user J clicks open the file, a 404 error occures "you are lost"

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• user J looks up the file in his /Shares folder.
• clicking it open there works. OK

[jnweiger]

fyi @emma1382