BooleanColumn: if reset filter (set prompt value that is equal to empty string) - then value in dropdown will be automatically set to 0 (Inactive)

[vadim-bulochnik]

Prerequisites

• I have searched for similar issues in both open and closed tickets and cannot find a duplicate.
• The issue still exists against the latest master branch of yii2-grid.
• This is not an usage question. I confirm having gone through and read the documentation and demos.
• This is not a general programming / coding question. (Those should be directed to the webtips Q & A forum).
• I have attempted to find the simplest possible steps to reproduce the issue.
• I have included a failing test as a pull request (Optional).

Steps to reproduce the issue

1. Add BooleanColumn to the grid with default settings.
2. Choose filter value "Active" (or "Inactive", it doesn't matter).
3. Reset filter value (by choosing prompt value).

Expected behavior and actual behavior

When I follow those steps, I see that filter value has been automatically set to "Inactive".

I was expecting that filter value will be set to "" (prompt).

Environment

PHP 7.3 (I have a feeling that this error is because of PHP version, because on your DEMO page it's okay)
Yii 2.0.46

Browsers

• Google Chrome
• Mozilla Firefox
• Internet Explorer
• Safari

Operating System

• Windows
• Mac OS X
• Linux
• Mobile

Libraries

• jQuery version: 2.2.4
• yii2-grid version: 3.5.0

Isolating the problem

• This bug happens on the demos page
• The bug happens consistently across all tested browsers
• This bug happens when using yii2-grid without other plugins.