[FIX] Fix user_watch in tiki-share : use a correct tokenId instead of the URL,
this fix the notification to the user.


git-svn-id: file:///var/local/code.tiki.org/tikisvn/branches/12.x@49160 b456876b-0849-0410-b77d-98878d47e9d5
[FIX] Fix double error reporting in tiki-share
[ENH] Add logs for bad email addresses and mail not sent...


git-svn-id: file:///var/local/code.tiki.org/tikisvn/branches/12.x@49161 b456876b-0849-0410-b77d-98878d47e9d5
[FIX] Suppress alt attribute for better UI visibility.


git-svn-id: file:///var/local/code.tiki.org/tikisvn/branches/12.x@49162 b456876b-0849-0410-b77d-98878d47e9d5
[FIX] json_decode returns null when the input string is not json

git-svn-id: file:///var/local/code.tiki.org/tikisvn/branches/12.x@49163 b456876b-0849-0410-b77d-98878d47e9d5