Added option to hide labels for post acces

refs https://github.com/TryGhost/Team/issues/800

- makes labels option in members segment select
- hides label options in segment select for post access

ghost/admin/app/components/gh-members-segment-select.js

@@ -73,7 +73,7 @@ export default class GhMembersSegmentSelect extends Component {
         // TODO: add `include: 'count.members` to query once API is fixed
         const labels = yield this.store.query('label', {limit: 'all'});
 
-        if (labels.length > 0) {
+        if (labels.length > 0 && !this.args.hideLabels) {
             const labelsGroup = {
                 groupName: 'Labels',
                 options: []

ghost/admin/app/components/gh-post-settings-menu-labs.hbs

@@ -101,6 +101,7 @@
                                     <div class="gh-radio-label">Members-only</div>
                                     <div class="gh-radio-desc">
                                         <GhMembersSegmentSelect
+                                            @hideLabels={{true}}
                                             @segment={{this.post.visibilitySegment}}
                                             @onChange={{action "setVisibility"}}
                                             @renderInPlace={{true}}

ghost/admin/app/components/gh-post-settings-menu.hbs

@@ -100,6 +100,7 @@
                                     <div class="gh-radio-label">Members-only</div>
                                     <div class="gh-radio-desc">
                                         <GhMembersSegmentSelect
+                                            @hideLabels={{true}}
                                             @segment={{this.post.visibilitySegment}}
                                             @onChange={{action "setVisibility"}}
                                             @renderInPlace={{true}}