[FIX] website tour: create a stub for bootstrap tour in automatic/test mode
[IMP] website snippet: add onfocus, onblur, onclone and onremove on snippet options; fix banner id
Launchpad automatic translations update.
[FIX] website tour: create a stub for bootstrap tour in automatic/test mode (need for full test and hide real bug for tour test)
[ADD] support for presized fields in website/image

also add presized field to attachments (automatically computed from datas)
[FIX] website: typo: message let the user think that he can change the mobile view while he cannot
[FIX] website: readability block with container css
[FIX] inject WORD JOINER inside p so they don't seemingly disappear after saving
[FIX] website tour: typo for banner (from usertest feedback)
[FIX] reduce span of paragraph spacer thing to not break layout
[FIX] website: The user does not see the content menu because of the tutorial is hover
[FIX] website_sale: display empty message for public user and allow admin to edit 'no product found' message
[MERGE] from trunk
[IMP] website snippet option: rename data-class into data-value
[IMP] website snippet: add onblur, onfocus, onremove, onclone method on snippet options. Change data-class into data-value for designer comprehention; fix slider unique id
[FIX] website: set inherit_branding in test contexts to trigger generation of relevant edition attributes