[xwiki-notifications] [jira@xwiki.org][Issue] Updates for CRISTAL-608: There is no loading indication when uploading an attachment

Attachments:

• attachment.html (text/html — 28.6 KB)
• attachment.png (image/png — 625 bytes)
• attachment.png (image/png — 2.5 KB)
• attachment.png (image/png — 213 bytes)