Progress bar/ importing words/terms count should have to shown on glossary import modal box.

When we are importing large number of glossary terms glossary import modal stays idle for long time , where we are not getting to know that how much terms are imported and how many remain.

It would be good if we show some progress bar or term counter.

Steps to reproduce:

• Login to zanata as admin.

• Click on glossary menu.

• Click on export from top right corner and export glossary terms to csv.

• Click on delete on top right corner and delete all.

• Click on import and select previously exported csv file.

• Observe the import dialog.

Actual Result:

• Glossary import modal box stays idal and user not getting the details of progress.

Expected Result :

• Glossary import pop-up should have to show progress bar/counter of terms imported.