show info window when uploading file

frontend-js/src/main/js/gui/admin/AddProjectDialog.js

@@ -936,6 +936,7 @@ AddProjectDialog.prototype.onSaveClicked = function () {
     if (converter !== null) {
       parserClass = converter.handler;
     }
+    GuiConnector.showProcessing("Uploading...");
     return ServerConnector.uploadFile({filename: self._filename, content: self.getFileContent()});
   }).then(function (file) {
     var options = {
@@ -956,6 +957,8 @@ AddProjectDialog.prototype.onSaveClicked = function () {
       "zip-entries": self.getZipEntries()
     };
     return ServerConnector.addProject(options);
+  }).finally(function () {
+    GuiConnector.hideProcessing();
   });
 };