When resizing the window to say 567px the language button doesn't collapse on Office Wiki
{F34567361}
# Developer notes
This looks another load order race condition. The issue is the `user-links-collapsible-item` class is not getting applied to the button.
I can replicate it when I do:
```
wfLoadSkin( 'Vector' );
wfLoadExtension('UniversalLanguageSelector');
```
I think the solution here is to stop using the hook in Vector and moving this to SkinVector::getTemplateData where ordering is better guaranteed.
# QA steps
- Test on https://wikidata.beta.wmflabs.org/wiki/Q356553
- Resize browser. When the screen gets too small the language button should disappear.
- Expanding the browser window should make the language button appear again.
== QA Results - Beta
| **AC** | **Status** | **Details** |
| ----- | ----- | ----- |
| 1 | ✅ | T287533#7263606 |
| 2 | ✅ | T287533#7263606 |