Fixes #770: Error message on (un)subscribe if an activity does not exist
add simple tag cloud to the members index page
no wiki icon in group list if wiki is empty
Merge pull request #783 from mknittig/bug-770

Fixes #770: Error message on (un)subscribe if an activity does not exist
Merge pull request #784 from heisee/master

add simple tag cloud to the members index page
remove console.log, comments and split only on commas
Merge pull request #786 from heisee/master

[tagcloud] remove console.log, comments and split only on commas
fixed testing issue with undefined value
Merge pull request #785 from janunger/master

minor improvement: no wiki icon in group list if wiki is empty
url-encodes special chars in json strings that are embedded in the HTML, sanitizes some chars from the interestets in the tag cloud
Merge pull request #788 from heisee/master

[tagcloud] url-encodes special chars in json strings that are embedded in the HTML,  sanitizes some chars from the interestets in the tag cloud