reduce app icon by 3px on home dashboard - wasn't lining up properly with…

reduce app icon by 3px on home dashboard - wasn't lining up properly with starred/recently viewed dasboard list properly

public/sass/components/_panel_pluginlist.scss

@@ -18,7 +18,7 @@
 }
 
 .pluginlist-image {
-  width: 20px;
+  width: 17px;
 }
 
 .pluginlist-title {