remove collab from calendar and fix left menu icon

git-svn-id: http://openbiz-cubi.googlecode.com/svn/trunk@5412 104121f4-e14d-89f9-dcf5-eda1cd0138dc
replace collab code

git-svn-id: http://openbiz-cubi.googlecode.com/svn/trunk@5413 104121f4-e14d-89f9-dcf5-eda1cd0138dc