Rerender modal on property changes (#4175)

Render function for BundleContainer must not be methods.
React doesn't know dependency of the method, so they won't rerender on property updates.

In this case, when you close modal and open another modal immediately,
old modal will be open instead of new one.

app/javascript/mastodon/features/ui/components/modal_root.js

@@ -54,12 +54,6 @@ export default class ModalRoot extends React.PureComponent {
     return { opacity: spring(0), scale: spring(0.98) };
   }
 
-  renderModal = (SpecificComponent) => {
-    const { props, onClose } = this.props;
-
-    return <SpecificComponent {...props} onClose={onClose} />;
-  }
-
   renderLoading = () => {
     return <ModalLoading />;
   }
@@ -95,7 +89,9 @@ export default class ModalRoot extends React.PureComponent {
               <div key={key} style={{ pointerEvents: visible ? 'auto' : 'none' }}>
                 <div role='presentation' className='modal-root__overlay' style={{ opacity: style.opacity }} onClick={onClose} />
                 <div className='modal-root__container' style={{ opacity: style.opacity, transform: `translateZ(0px) scale(${style.scale})` }}>
-                  <BundleContainer fetchComponent={MODAL_COMPONENTS[type]} loading={this.renderLoading} error={this.renderError} renderDelay={200}>{this.renderModal}</BundleContainer>
+                  <BundleContainer fetchComponent={MODAL_COMPONENTS[type]} loading={this.renderLoading} error={this.renderError} renderDelay={200}>
+                    {(SpecificComponent) => <SpecificComponent {...props} onClose={onClose} />}
+                  </BundleContainer>
                 </div>
               </div>
             ))}