Form Migrations: Button (#23019)

* Update legacy exports and fix Type errors

* Remove Button and LinkButton from Forms namespace

* Fix errors

* Update snapshots

* Move Legacy button

* Migrate more Buttons

* Remove legacy button dependency

* Move button up

* Remove legacy button

* Update Snapshots

* Fix ComponentSize issues

* Switch primary button

* Switch primary

* Add classNames and fix some angular directive issues

* Fix failing build and remove log

Co-authored-by: Torkel Ödegaard <torkel@grafana.com>

public/app/plugins/panel/news/NewsPanelEditor.tsx

@@ -58,7 +58,7 @@ export class NewsPanelEditor extends PureComponent<PanelEditorProps<NewsOptions>
               <div>
                 <br />
                 <div>If the feed is unable to connect, consider a CORS proxy</div>
-                <Button variant="inverse" onClick={this.onSetProxyPrefix}>
+                <Button variant="secondary" onClick={this.onSetProxyPrefix}>
                   Use Proxy
                 </Button>
               </div>