no popup dialog for Shibboleth in FullView while mailing a record or trying
to add a tag

Attention: the current implementation is quite a mess
VuFind itself is using several JavaScript implementations for more or less the same topic
Because we can't use the popup dialog mechanisms for authentication with Shibboleth
therefor we have to copy these several implementation into our own theme
bootstrap to the rescue...
Merge branch 'development' of github.com:swissbib/sbvf2 into development