Design-plone-theme

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- Remove pat-moment from documentByLine viewlet.
[cekk]

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- Update breadcrumbs, title in folder contents nav [nzambello]

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- Added python3 compatibility [cekk]
- updated redturtle.tiles.management dependency version [daniele]
- Handled external links in tile collections [nzambello]
- Handled external links in navigation portlet [nzambello]

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- Photogallery tile collection: opening external links in new tab [nzambello]

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- Removed use of grids to avoid Chrome 80 bug [nzambello]

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- cleanup registry.xml and fixed tinymce template registration [nzambello]