881 Mention functionality works incorrectly - search for a person by name

[email protected] added a feedback(#2482415) from https://app.greatalbum.net/group/210/topics:

Steps to reproduce the bug:

1. Navigate to the album
2. Click on the Event/Article/Individual/Topic/Place/Image/Remote Video
3. Click on the comment section
4. Enter the person's name in the comment section field, adding the @ symbol for mention.
5. Validate search result

Expected Result: Search finds by the entered full name of the person.
Actual Result: Search finds by partially entered person's name.

Attachment: https://static.userback.io/57763/project/71541/feedback/2482415/attachment/__________________________2023_03_16____10.53.12.mov

Session details:

• Feedback ID: #2482415
• Browser: Chrome 109.0.0.0 (macOS)
• Rating: N/A
• Window Size: 1389 x 796
• Resolution: 1440 x 900
• DPI: 1
• Colour Depth: 24-bit
• Category: Album

View feedback details in Userback:
https://app.userback.io/viewer/36775/71541/2482415VhCh1c8p/