Accordion: Added ui-accordion-header-icon class to generated icons in…

… order to not interfere with any additional icons that users might add.

themes/base/jquery.ui.accordion.css

@@ -13,6 +13,6 @@
 .ui-accordion .ui-accordion-header-active { border-bottom: 0 !important; }
 .ui-accordion .ui-accordion-heading { display: block; font-size: 1em; padding: .5em .5em .5em .7em; }
 .ui-accordion-icons .ui-accordion-heading { padding-left: 2.2em; }
-.ui-accordion .ui-accordion-header .ui-icon { position: absolute; left: .5em; top: 50%; margin-top: -8px; }
+.ui-accordion .ui-accordion-header .ui-accordion-header-icon { position: absolute; left: .5em; top: 50%; margin-top: -8px; }
 .ui-accordion .ui-accordion-content { padding: 1em 2.2em; border-top: 0; margin-top: -2px; position: relative; top: 1px; margin-bottom: 2px; overflow: auto; display: none; zoom: 1; }
 .ui-accordion .ui-accordion-content-active { display: block; }

ui/jquery.ui.accordion.js

@@ -98,17 +98,17 @@ $.widget( "ui.accordion", {
 		var icons = this.options.icons;
 		if ( icons ) {
 			$( "<span>" )
-				.addClass( "ui-icon " + icons.header )
+				.addClass( "ui-accordion-header-icon ui-icon " + icons.header )
 				.prependTo( this.headers );
-			this.active.children( ".ui-icon" )
+			this.active.children( ".ui-accordion-header-icon" )
 				.removeClass( icons.header )
 				.addClass( icons.activeHeader );
 			this.element.addClass( "ui-accordion-icons" );
 		}
 	},
 
 	_destroyIcons: function() {
-		this.headers.children( ".ui-icon" ).remove();
+		this.headers.children( ".ui-accordion-header-icon" ).remove();
 		this.element.removeClass( "ui-accordion-icons" );
 	},
 
@@ -272,7 +272,7 @@ $.widget( "ui.accordion", {
 		this.active
 			.removeClass( "ui-state-active ui-corner-top" )
 			.addClass( "ui-state-default ui-corner-all" )
-			.children( ".ui-icon" )
+			.children( ".ui-accordion-header-icon" )
 				.removeClass( this.options.icons.activeHeader )
 				.addClass( this.options.icons.header );
 		this.active.next().addClass( "ui-accordion-content-active" );
@@ -345,14 +345,14 @@ $.widget( "ui.accordion", {
 		active
 			.removeClass( "ui-state-active ui-corner-top" )
 			.addClass( "ui-state-default ui-corner-all" )
-			.children( ".ui-icon" )
+			.children( ".ui-accordion-header-icon" )
 				.removeClass( options.icons.activeHeader )
 				.addClass( options.icons.header );
 		if ( !clickedIsActive ) {
 			clicked
 				.removeClass( "ui-state-default ui-corner-all" )
 				.addClass( "ui-state-active ui-corner-top" )
-				.children( ".ui-icon" )
+				.children( ".ui-accordion-header-icon" )
 					.removeClass( options.icons.header )
 					.addClass( options.icons.activeHeader );
 			clicked