Fixing minor visual inconsistencies in the GUI settings and clusters views.

Change-Id: I8cb0af13de693e855f3ea2ce0a91717356bc5eca
diff --git a/web/gui/src/main/webapp/app/view/settings/settings.js b/web/gui/src/main/webapp/app/view/settings/settings.js
index 23ed49a..caca00c 100644
--- a/web/gui/src/main/webapp/app/view/settings/settings.js
+++ b/web/gui/src/main/webapp/app/view/settings/settings.js
@@ -68,7 +68,7 @@
     }
 
     function addCloseBtn(div) {
-        is.loadEmbeddedIcon(div, 'close', 26);
+        is.loadEmbeddedIcon(div, 'close', 20);
         div.on('click', closePanel);
     }