Fix for issue #2933

[codeMinter]

No description provided.

[maxceem]

Works good @gurmeetb.

There is only one case when it's not completely works:

1. If we enter a short username, then entering SPACE or ; doesn't work:
   

   While autosuggestion works only after minimal text length AUTOCOMPLETE_TRIGGER_LENGTH. If we manually enter username it should work after we enter at least 1 character.

2. Inside onInputChange method you return an empty string: return ''. As this method actually should not return anything, to avoid confusion, could you please don't return anything. You can use just return with nothing after it.

[codeMinter]

@maxceem fixed and also added support so users cannot enter first value as space or semi-colon, as discussed.

[maxceem]

Works great @gurmeetb.

Just fix two lint errors before I can merge it:

║ 20       │ 56       │ error    │ Unnecessarily quoted property 'label' found.           │ quote-props          ║
║ 20       │ 77       │ error    │ Unnecessarily quoted property 'value' found.           │ quote-props          ║

Thank you.

[codeMinter]

@maxceem my bad, missed to run lint. Fixed it now.

[maxceem]

Thank you for quick fixes @gurmeetb.
Everything works good.