Pop-up hint fetches wrong result in case-sensitive cases

[v1993]

Describe the bug
If there are both attribute and ATTRIBUTE elements in same context, pop-up hint for attribute will be the one for ATTRIBUTE. This is very apparent in libnm docs, which has constants for most of its attribute names.

To Reproduce
Steps to reproduce the behavior:

1. Go to https://valadoc.org/libnm/NM.Client.html
2. Hover over any of its properties, e.g. activating_connection
3. Get hint for constant of the same name instead, e.g. ACTIVATING_CONNECTION

Expected behavior
Correct hint should load instead.

Screenshots

Desktop (please complete the following information):

• OS: KUbuntu
• Browser: Chrome
• Version: 98.0.4758.102