GUI -- Cleanup in sample view, toolbar and button services.

Change-Id: I8e1f2cc344547f1a76681d74eec138495dd39bf6
diff --git a/web/gui/src/main/webapp/app/fw/widget/button.css b/web/gui/src/main/webapp/app/fw/widget/button.css
index 9b4c519..42160af 100644
--- a/web/gui/src/main/webapp/app/fw/widget/button.css
+++ b/web/gui/src/main/webapp/app/fw/widget/button.css
@@ -32,11 +32,11 @@
 .toggleButton,
 .radioSet {
     display: inline-block;
-    padding: 0 4px 0 4px;
+    padding: 0 4px;
 }
 .radioButton {
     display: inline-block;
-    padding: 0 2px 0 2px;
+    padding: 0 2px;
 }
 
 .button svg.embeddedIcon,