Collective.tiles.collection

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- Fix translations.
[cekk]

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- Fixed permission to see empty tile collection message.
- Fixed vocabulary source for schema choice in tile collecton to support pam.
[eikichi18]
- List of renderers is now sorted by title.
[cekk]

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- Fix document outline [nzambello]
- Improved navigation experience when choosing the collection to use [daniele]

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- Enable other content types to be chosen as the More link [daniele]
- Fixed a bug that hid a tile collection with no elements to display. If a user
can edit the tiles, now he can see the empty tile.
[arsenico13]
- Update some italian translations.
[arsenico13]
- Fix templates for container styles in base view and in empty tile handling
[nzambello]

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- Added Custom "more..." collection field
[fdelia]

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- Production release
[lucabel]