Added default recipient settings handling to publishing flow

closes https://github.com/TryGhost/Team/issues/1593

- swapped `recipientFilter` for `selectedRecipientFilter` tracked property with a default value of `undefined`
- added `defaultRecipientFilter` getter that uses settings and post attributes to return a filter string that matches the defined default recipient settings
- added `recipientFilter` getter to replace the previous tracked property, this checks `selectedRecipientFilter` being `undefined` and will return `defaultRecipientFilter` instead
  - changing the filter updates `selectedRecipientFilter` acting as an override of the default
  - keeping `recipientFilter` naming means the options part of the flow requires no changes

ghost/admin/app/components/editor-labs/publish-management.js

@@ -145,7 +145,7 @@ export class PublishOptions {
 
     // both of these are set to site defaults in `setupTask`
     @tracked newsletter = null;
-    @tracked recipientFilter = 'status:free,status:-free';
+    @tracked selectedRecipientFilter = undefined;
 
     get newsletters() {
         return this.allNewsletters
@@ -161,6 +161,40 @@ export class PublishOptions {
         return this.newsletters.length === 1;
     }
 
+    get recipientFilter() {
+        return this.selectedRecipientFilter === undefined ? this.defaultRecipientFilter : this.selectedRecipientFilter;
+    }
+
+    get defaultRecipientFilter() {
+        const defaultEmailRecipients = this.settings.get('editorDefaultEmailRecipients');
+
+        if (defaultEmailRecipients === 'disabled') {
+            return null;
+        }
+
+        if (defaultEmailRecipients === 'visibility') {
+            if (this.post.visibility === 'public') {
+                return 'status:free,status:-free';
+            }
+
+            if (this.post.visibility === 'members') {
+                return 'status:free,status:-free';
+            }
+
+            if (this.post.visibility === 'paid') {
+                return 'status:-free';
+            }
+
+            if (this.post.visibility === 'tiers') {
+                return this.post.visibilitySegment;
+            }
+
+            return this.post.visibility;
+        }
+
+        return this.settings.get('editorDefaultEmailRecipientsFilter');
+    }
+
     get fullRecipientFilter() {
         let filter = this.newsletter.recipientFilter;
 
@@ -178,7 +212,7 @@ export class PublishOptions {
 
     @action
     setRecipientFilter(newFilter) {
-        this.recipientFilter = newFilter;
+        this.selectedRecipientFilter = newFilter;
     }
 
     // setup -------------------------------------------------------------------