Rename JS sub-components so that descriptors are before the noun, not after

To be consistent with the naming in PHP world.

e.g. ReplyComposer instead of ComposerReply

js/forum/src/components/edit-composer.js

@@ -0,0 +1,54 @@
+import ItemList from 'flarum/utils/item-list';
+import ComposerBody from 'flarum/components/composer-body';
+import Alert from 'flarum/components/alert';
+import ActionButton from 'flarum/components/action-button';
+
+/**
+  The composer body for editing a post. Sets the initial content to the
+  content of the post that is being edited, and adds a title control to
+  indicate which post is being edited.
+ */
+export default class EditComposer extends ComposerBody {
+  constructor(props) {
+    props.submitLabel = props.submitLabel || 'Save Changes';
+    props.confirmExit = props.confirmExit || 'You have not saved your changes. Do you wish to discard them?';
+    props.originalContent = props.originalContent || props.post.content();
+    props.user = props.user || props.post.user();
+
+    super(props);
+  }
+
+  headerItems() {
+    var items = new ItemList();
+    var post = this.props.post;
+
+    items.add('title', m('h3', [
+      'Editing ',
+      m('a', {href: app.route.discussion(post.discussion(), post.number()), config: m.route}, 'Post #'+post.number()),
+      ' in ', post.discussion().title()
+    ]));
+
+    return items;
+  }
+
+  data() {
+    return {
+      content: this.content()
+    };
+  }
+
+  onsubmit() {
+    var post = this.props.post;
+
+    this.loading(true);
+    m.redraw();
+
+    post.save(this.data()).then(post => {
+      app.composer.hide();
+      m.redraw();
+    }, response => {
+      this.loading(false);
+      m.redraw();
+    });
+  }
+}