Imio.smartweb.common

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- Add helper method to get language from smartweb REST requests
This is needed for multilingual authentic sources
[laulaz]

- Allow to translate vocabulary terms titles in search-filters endpoint
This is needed for multilingual authentic sources
[laulaz]

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- MWEB-54 : Update TinyMCE : Add non breaking space option
[boulch]

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- Add connection link in colophon
[laulaz]

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- Add ban_physicalpath method (taken from policy)
[boulch, laulaz]

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- Refactor rich description to retrieve html on a any description
(from context or from other ways)
[boulch]

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- Limit uploaded files sizes to 20Mo with JS (without reaching the server)
[laulaz]

- Add help text on lead image field also on edit forms
[laulaz]