AdwEntryRow doesn't have a way to set a maximum number of characters limit
Unlike GtkEntry, which has the max-length property to limit the number of the characters that can be typed, AdwEntryRow doesn't have this.
This is needed in GNOME Settings:
- In Wi-Fi > Turn On Wi-Fi Hotspot, the "Network Name" entry has a limit of 64 characters
- In System > Users > Add User, the "Username" entry has a limit of 255 characters
Edited by Automeris naranja