Stub new boost button, move pop back to navbar for now

app/assets/images/thumb-up.svg

@@ -0,0 +1 @@
+<svg viewBox="0 0 24 24" xmlns="http://www.w3.org/2000/svg"><path d="m23 10c0-1.11-.9-2-2-2h-6.32l.96-4.57c.02-.1.03-.21.03-.32 0-.41-.17-.79-.44-1.06l-1.06-1.05-6.58 6.58c-.37.37-.59.87-.59 1.42v10a2 2 0 0 0 2 2h9c.83 0 1.54-.5 1.84-1.22l3.02-7.05c.09-.23.14-.47.14-.73zm-22 11h4v-12h-4z"/></svg>

app/views/bubbles/show.html.erb

@@ -6,6 +6,10 @@
       <%= image_tag "arrow-left.svg", aria: { hidden: true }, size: 24 %>
       <span class="for-screen-reader">Back</span>
     <% end %>
+
+    <span class="flex-item-justify-end">
+      <%= render "bubbles/pop_toggle", bubble: @bubble %>
+    </span>
   </nav>
 <% end %>
 
@@ -26,7 +30,7 @@
     <% end %>
     <%= bubble_action_button('new-tag', 'tag', 'Tag this') %>
     <%= bubble_action_button('new-attachment', 'picture-add', 'Attach a file') %>
-    <%= render "bubbles/pop_toggle", bubble: @bubble %>
+    <%= bubble_action_button('new-boost', 'thumb-up', 'Boost this') %>
   </div>
 </aside>