edited readme and changelog

sources/readme/en.html

@@ -81,6 +81,10 @@
 
 <p>Uncheck box if you do not use popup messages.</p>
 
+<p><strong>Add stretch</strong></p>
+
+<p>Add stretch (spacer) to the selected side of the widget.</p>
+
 <p><strong>Custom time</strong></p>
 
 <ul>