Copy change for subtitle on shareModal

ghost/admin/app/components/modal-post-share.hbs

@@ -1,5 +1,5 @@
 <div class="modal-content">
-       {{#if (this.post.featureImage)}}
+    {{#if (and this.post.featureImage (not this.post.emailOnly))}}
         <figure class="modal-image">
             <img src="{{this.post.featureImage}}" alt="{{this.post.title}}">
         </figure>
@@ -15,7 +15,7 @@
     <button type="button" class="close" title="Close" {{on "click" @close}}>{{svg-jar "close"}}<span class="hidden">Close</span></button>
 
     <div class="modal-body">
-      Spread the word and share your post with your audience.
+      Tell your audience, spread the word, and increase your reach.
     </div>
 
     <footer class="modal-footer">