Button: Adding quotes to the attribute selector for labels - Fixes #7534 - Button label selector omits quotes / fails for ids with ":"

(cherry picked from commit 065aef5)

Conflicts:

	ui/jquery.ui.button.js

Author: gnarf

tests/unit/button/button_tickets.js

@@ -50,4 +50,10 @@ test( "#7092 - button creation that requires a matching label does not find labe
 	ok( group.find( "label" ).is( ".ui-button" ) );
 });
 
+test( "#7534 - Button label selector works for ids with \":\"", function() {
+	var group = $( "<span><input type='checkbox' id='check:7534'><label for='check:7534'>Label</label></span>" );
+	group.find( "input" ).button();
+	ok( group.find( "label" ).is( ".ui-button" ), "Found an id with a :" );
+});
+
 })( jQuery );

ui/jquery.ui.button.js

@@ -227,7 +227,7 @@ $.widget( "ui.button", {
 			// we don't search against the document in case the element
 			// is disconnected from the DOM
 			var ancestor = this.element.parents().filter(":last"),
-				labelSelector = "label[for=" + this.element.attr("id") + "]";
+				labelSelector = "label[for='" + this.element.attr("id") + "']";
 			this.buttonElement = ancestor.find( labelSelector );
 			if ( !this.buttonElement.length ) {
 				ancestor = ancestor.length ? ancestor.siblings() : this.element.siblings();