type AppTabs = widget.TabContainer
AppTabs container is used to split your application into various different areas identified by tabs. The tabs contain text and/or an icon and allow the user to switch between the content specified in each TabItem. Each item is represented by a button at the edge of the container.
func NewAppTabs(items ...*TabItem) *AppTabs
NewAppTabs creates a new tab container that allows the user to choose between different areas of an app.