Button: Fixed the height of icon-only buttons in controlgroups

Author: jaspermdegroot

themes/base/button.css

@@ -27,21 +27,19 @@
 .ui-button:active {
 	text-decoration: none;
 }
+
 /* to make room for the icon, a width needs to be set here */
 .ui-button-icon-only {
-	padding: 0;
-	height: 2.1em;
+	width: 2.2em;
+	box-sizing: border-box;
 	text-indent: -9999px;
 	white-space: nowrap;
 }
+
 .ui-icon {
 	position: absolute;
 	display: block;
 }
-/* button elements seem to need a little more width */
-button.ui-button-icon-only {
-	width: 2.4em;
-}
 
 /* no icon support for input elements, provide padding by default */
 input.ui-button.ui-icon-end,