Added 3 new styles for bar buttons. (#168)

* Added a new style called split for bar buttons

* Added wavy button styles.

* Added padding configuration

* Update bar padding

* Fix styling for battery style2

* Fix icon only setting for bar

* Update types and options

* Add button style to exported theme props.

* Fix top margin for menus.

scss/style/menus/menu.scss

@@ -235,7 +235,7 @@
 
 .event-top-padding * {
   min-height: 0em;
-  margin-top: 2.8em + if($bar-floating, $bar-margin_top, 0em);
+  margin-top: 2.8em + if($bar-floating, $bar-margin_top * 1.1, $bar-margin_top * 0.1);
 }
 
 @keyframes spin {