Merged in bugfix/HOR-4039 (pull request #6189)

HOR-4039

Approved-by: Julio Cesar Laura Avendaño <contact@julio-laura.com>

workflow/engine/templates/admin/pmLogo.js

@@ -243,13 +243,31 @@ Ext.onReady(function() {
                     emptyText: '',
                     fieldLabel: _('ID_IMAGE'),
                     buttonText: _('ID_SELECT_FILE'),
-        name       : 'img'
+                    name: 'img',
+                    validator: function (filePath) {
+                        var flag, btn;
+                        btn = Ext.getCmp('btnUpload');
+                        btn.disable();
+
+                        filePath = filePath.replace(/^\s|\s$/g, ""); //trims string
+                        if (filePath.match(/([^\/\\]+)\.(gif|png|jpg|jpeg|pjpeg|x-png)$/i)) {
+                            flag = true;
+                            btn.enable();
+                        } else {
+                            messageError = _('ID_ERROR_UPLOADING_IMAGE_TYPE');
+                            PMExt.notify(_('ID_ERROR'), messageError);
+                            flag = false;
+                        }
+                        return flag;
+                    }
                 }
             ],
         buttons:
             [
                 {
                     text: _('ID_UPLOAD'),
+                    id: 'btnUpload',
+                    disabled: true,
                     handler: function () {
                         panelRightTop.getForm().submit({
                             url: '../adminProxy/uploadImage',