added some more buttons to start page
better layout for start page buttons
changed a menu caption
bugfix: users with orgaAdmin or orgaHostsManager flags are now assumed to be admins/hostsmanagers by the webfrontend when no organization is given
fixed button visibility
Merge pull request #768 from t-gerhard/hide_buttons_if_no_adminhostmanager

Hide buttons if no adminhostmanager