[FIX] Gantt Chart: Correction of the non-display of the activity indicator(loader) when saving a Gantt chart

When we click on the "Save" button to save a Gantt after creation or modification, the Gantt chart is saved but the loader that indicates the saving activity is not displayed; instead, the text "Loading" that corresponds to the value of the "alt" attribute of the loader image is displayed. After troubleshooting, I found that it was due to the incorrect path to the loader image, value of the "src" attribute of the image tag. Changing the path to the spinner fixed it.

For more details: https://avan.tech/item74734