Fix AccountCard stretch to 100% (#4450)

js/src/modals/DappPermissions/dappPermissions.css

@@ -31,8 +31,10 @@
   }
 }
 
-.selected, .unselected {
+.selected,
+.unselected {
   margin-bottom: 0.25em;
+  width: 100%;
 
   &:focus {
     outline: none;

js/src/ui/Portal/portal.js

@@ -34,7 +34,11 @@ export default class Portal extends Component {
     activeStep: PropTypes.number,
     busy: PropTypes.bool,
     busySteps: PropTypes.array,
-    buttons: PropTypes.array,
+    buttons: PropTypes.oneOfType([
+      PropTypes.array,
+      PropTypes.node,
+      PropTypes.object
+    ]),
     children: PropTypes.node,
     className: PropTypes.string,
     hideClose: PropTypes.bool,