Fixes #8272 upload save

javascript/src/QfqForm.js

@@ -110,6 +110,7 @@ var QfqNS = QfqNS || {};
         }
 
         this.fileUploader = new n.FileUpload('#' + this.formId, this.fileUploadTo);
+        this.startUploadHandler = this.startUploadHandler.bind(this);
         this.fileUploader.on('fileupload.started', this.startUploadHandler);
         this.fileUploader.on('fileupload.upload.successful', that.fileUploadSuccessHandler);
 
@@ -117,6 +118,7 @@ var QfqNS = QfqNS || {};
             function (obj) {
                 n.Helper.showAjaxError(null, obj.textStatus, obj.errorThrown);
             });
+        this.endUploadHandler = this.endUploadHandler.bind(this);
         this.fileUploader.on('fileupload.ended', this.endUploadHandler);
 
         this.fileDeleter = new n.FileDelete("#" + this.formId, this.fileDeleteUrl);
@@ -818,6 +820,16 @@ var QfqNS = QfqNS || {};
         this.resetLockState();
     };
 
+    n.QfqForm.prototype.deactivateSaveButton = function() {
+        this.getSaveButton().addClass("disabled");
+        this.getSaveButton().attr("disabled", "disabled");
+    };
+
+    n.QfqForm.prototype.activateSaveButton = function() {
+        this.getSaveButton().removeClass("disabled");
+        this.getSaveButton().removeAttr("disabled");
+    };
+
     n.QfqForm.prototype.getSaveButtonAttentionClass = function () {
         var $saveButton = this.getSaveButton();
 
@@ -1199,6 +1211,7 @@ var QfqNS = QfqNS || {};
         $(obj.target).after(
             $('<i>').addClass('spinner')
         );
+        this.deactivateSaveButton();
     };
 
     /**
@@ -1208,6 +1221,7 @@ var QfqNS = QfqNS || {};
     n.QfqForm.prototype.endUploadHandler = function (obj) {
         var $siblings = $(obj.target).siblings();
         $siblings.filter("i").remove();
+        this.activateSaveButton();
     };
 
     /**