Make tab accept the text input

[farmaazon]

Pull Request Description

Fixes #10855

Added handler for tab key. We cannot accept input on blur, as sometimes it should not be accepted (as when user clicks at drop-down option where text widget was providing filtering pattern).

Important Notes

Checklist

Please ensure that the following checklist has been satisfied before submitting the PR:

• The documentation has been updated, if necessary.
• [ ] Screenshots/screencasts have been attached, if there are any visual changes. For interactive or animated visual changes, a screencast is preferred.
• All code follows the
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  and
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  style guides. In case you are using a language not listed above, follow the Rust style guide.
• [ ] Unit tests have been written where possible.