set buttonBusy true as default

src/Volo.Abp.AspNetCore.Mvc.UI.Theme.Shared/wwwroot/libs/abp/aspnetcore.mvc.ui.theme.shared/jquery/jquery-extensions.js

@@ -10,6 +10,10 @@
             var $icon = $button.find('i');
             var $buttonInnerSpan = $button.find('span');
 
+            if (isBusy === undefined) {
+                isBusy = true;
+            }
+
             if (isBusy) {
                 if ($button.hasClass('button-busy')) {
                     return;
@@ -76,4 +80,6 @@
         return obj;
     };
 
+
+
 })(jQuery);