Abnormal search box while the keyword is ended with a space

[Geeyun-JY3]

Describe the issue

While the keyword is ended with a space, query dropdown menu of the search box (left part) would display the whole text of the keyword instead of Custom search.
While the keyword text is long, the query dropdown menu would become so long that it is impossible to edit the keyword entered previously.

I already tried

• I've read and searched the documentation.
• I've searched for similar issues in this repository.

Steps to reproduce the behavior

1. Go to the search page
2. Enter the keyword which is ended with a space

Expected behavior

Always show Custom search

Screenshots

• https://hosted.weblate.org/search/weblate/?offset=1&q=The+first+approach+&sort_by=-priority%2Cposition&checksum=
  

• https://hosted.weblate.org/search/weblate/?offset=1&q=The+first+approach+is+easy+with+monolingual+files+-+you+can+add+new+strings+within+Weblate+and+leave+whole+editing+of+the+files+there.+&sort_by=-priority%2Cposition&checksum=
  

Exception traceback

No response

How do you run Weblate?

weblate.org service

Weblate versions

No response

Weblate deploy checks

No response

Additional context

No response

[github-actions]

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