Problem:
When using Special:NewItem and Special:NewLexeme using keyboard navigation then the language selectors are covering other input fields. This is very annoying for editors as it makes it hard to continue creating the Item or Lexeme.

Steps to reproduce:

On Special:NewItem:

1. go to https://www.wikidata.org/wiki/Special:NewItem
2. click into the language field
3. select a language
4. tab out of the language field
5. tab again to the next field
6. observe the language selector opening again

On Special:NewLexeme:

1. go to https://www.wikidata.org/wiki/Special:NewLexeme
2. fill in a Lemma
3. fill in a "Language for Lexeme" that's not a standard language (try "Maldives" 📦
4. fill in a "Spelling variant of the Lemma"
5. tab out of the spelling variant field
6. tab again to the next field
7. observe the language selector opening again

Acceptance criteria:

• language selector stays closed when tabbing out of the language field on Special:NewItem
• spelling variant selector stays closed when tabbing out of the spelling variant field on Special:NewLexeme