Neil Giarratana

Emit 'collapse' event from Navbar Component

1

Note: We are using v2 branch. In order to use a transforming hamburger button with the mobile navbar, we need to have an event emitted from the `Navbar` component so...

## What does it do? - Removes panel heading if the panel is not nested in an accordion and has neither header property nor slot - Adds a Panel documentation...

We needed this for a current project so went ahead and built it. Hope it can help the project. ```

## What this does: - adds prop for `container` that can either be `fixed` or `fluid` - updates documentation to show fixed or fluid navbar cc: @yuche @wffranco