Renamed Element.Panel to Element.Container
Added new Element.Panel which takes a header or header and footer and creates a panel around them and whatever children is added to it to the body.
Reworked the BasicPageAdminProvider to use the new panel.
Changed Element.Emphasis and Element.Alert and updated the themes correspondingly.
Added containers to all BasicPageAdmin tabs.
Renamed InputButton to Button, InputSubmit to SubmitButton and InputReset to ResetButton. Changed it to render as button instead of input tag.
Added ButtonGroup and ButtonDropDown to Element.