Allign button in sandbox workflow to the middle of the page

This PR fixes #2506.

Signed-off-by: Denis Golovin dgolovin@redhat.com

Author: dgolovin

src/webview/cluster/app/cluster.style.tsx

@@ -78,7 +78,6 @@ export default (theme: Theme) =>
       margin: theme.spacing(2)
     },
     button: {
-      display: 'table-cell',
       minWidth: '8rem',
       maxWidth: '20rem',
       maxHeight: '5rem',