Moved members list item components

no issue

- moved screen-specific components out of the top-level components directory
- top-level directory should eventually only contain generally re-usable/application-wide components

ghost/admin/app/components/members/list-item-column.js

@@ -2,7 +2,7 @@ import Component from '@glimmer/component';
 import {get} from '@ember/object';
 import {mostRecentlyUpdated} from 'ghost-admin/helpers/most-recently-updated';
 
-export default class GhMembersListItemColumn extends Component {
+export default class MembersListItemColumn extends Component {
     constructor(...args) {
         super(...args);
     }

ghost/admin/app/components/members/list-item.js

@@ -1,7 +1,7 @@
 import Component from '@glimmer/component';
 import {inject as service} from '@ember/service';
 
-export default class GhMembersListItem extends Component {
+export default class MembersListItem extends Component {
     @service store;
 
     constructor(...args) {

ghost/admin/app/templates/members.hbs

@@ -127,12 +127,12 @@
                         </thead>
                         <VerticalCollection @tagName="tbody" @items={{this.members}} @key="id" @containerSelector=".gh-list-scrolling" @estimateHeight={{69}} @staticHeight={{true}} @bufferSize={{20}} as |member|>
                             {{#if member.is_loading}}
-                                <GhMembersListItemLoading
+                                <Members::ListItemLoading
                                     @newsletterEnabled={{not-eq this.settings.editorDefaultEmailRecipients "disabled"}}
                                     @filterColumns={{this.filterColumns}}
                                 />
                             {{else}}
-                                <GhMembersListItem
+                                <Members::ListItem
                                     @newsletterEnabled={{not-eq this.settings.editorDefaultEmailRecipients "disabled"}}
                                     @member={{member.content}}
                                     @filterColumns={{this.filterColumns}}