Euphorie

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- Missing translation in CA.

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- In the top-left menu inside a session (osc-header), display the user-
defined session name, instead of the generic survey name
- Introduced "Share via Twitter / Facebook / Email".
Must be activated via "allow_social_sharing=True" in euphorie.ini
- When a user enters a guest session, actually open the survey session
and jump to the start of the survey
- Updated translations in NL

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- Bugfix for report download (print list of all risks): don't choke on user-
defined custom risks

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- When it comes to generating the reports for download, be more defensive about
fetching the custom risks (PART II)

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- When it comes to generating the reports for download, be more defensive about
fetching the custom risks.

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- Translation changes for NL