tab: add #getTitleComponent() (issue #41)

This enables us to control right click operation.
add_tab: sort by priority (issue #41)
UserInfo: fix redundunt timeline fetching and $reader causes NPE (issue #41)
QueryEdit: fix very long long name shown in QueryEditConfigType (issue #41)
add_tab: add separator (issue #41)
add_tab: update layout frame (fixes #41)