Add isBlurring flag for .blur and .close methods

Fixes failing test after regression in selectize#1353, while
trying to preserve its functionality.

Author: joallard

src/selectize.js

@@ -19,6 +19,7 @@ var Selectize = function($input, settings) {
 
 		eventNS          : '.selectize' + (++Selectize.count),
 		highlightedValue : null,
+		isBlurring       : false,
 		isOpen           : false,
 		isDisabled       : false,
 		isRequired       : $input.is('[required]'),
@@ -652,10 +653,12 @@ $.extend(Selectize.prototype, {
 			// IE11 bug: element still marked as active
 			dest && dest.focus && dest.focus();
 
+			self.isBlurring = false;
 			self.ignoreFocus = false;
 			self.trigger('blur');
 		};
 
+		self.isBlurring = true;
 		self.ignoreFocus = true;
 		if (self.settings.create && self.settings.createOnBlur) {
 			self.createItem(null, false, deactivate);
@@ -1783,7 +1786,7 @@ $.extend(Selectize.prototype, {
 			// Do not trigger blur while inside a blur event,
 			// this fixes some weird tabbing behavior in FF and IE.
 			// See #1164
-			if (self.ignoreFocus) {
+			if (!self.isBlurring) {
 				self.$control_input.blur(); // close keyboard on iOS
 			}
 		}