This PR extends `Button` with support for an optional icon to be
displayed next to the label.
As part of this, the functionality for displaying an icon within a
button has been factored out into an internal `ButtonIcon` component.
`ButtonIcon` is now used by both `IconButton` and `Button` to
encapsulate the concerns of an icon that is rendered within a button.
Release Notes:
- N/A
This PR adds new `Button` and `IconButton` components built on top of
our new button abstractions.
Both of these buttons are built from the common `ButtonLike` base, and
implement the `ButtonCommon` (name TBD) trait in order to provide a
common interface.
There are still some visual tweaks that we'll need to make to the new
buttons, but those should be straightforward to make after we land this.
Release Notes:
- N/A
Marshall Bowers
Nate ButlerandMarshall Bowers