Fix: Fixed issue with editing properties of multiple items at the same time

[marcofranzen99]

Resolved / Related Issues

• Were these changes approved in an issue or discussion with the project maintainers? In order to prevent extra work, feature requests and changes to the codebase must be approved before the pull request will be reviewed. This prevents extra work for the contributors and maintainers.
  Closes Bug: Unable to edit the properties of multiple items simultaneously #14900

Validation
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Test Cases
Hidden status is saved and displayed correctly directly in the UI if only one file is selected

• Select a file, open properties, select hidden + save
• The file is now displayed directly in the list as hidden
• Open properties again and check whether hidden status is set

Hidden status is saved and displayed correctly directly in the UI when multiple files are selected

• Select multiple files, select hidden + save
• The files are now displayed directly in the list as hidden
• Open properties again and check whether hidden status is set

Screenshots (optional)
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[hishitetsu]

There is a glitch in the following step.

1. Select hidden and non-hidden files together.
2. Open the properties window.
3. Press the Save button.
4. The list appears as if the hidden attribute has been removed, but in fact it has not.

It might be better to put the checkbox in the third state when hidden and non-hidden files are selected together.

[marcofranzen99]

It might be better to put the checkbox in the third state when hidden and non-hidden files are selected together.

Good idea, thank you

I did the same for the readonly file attribute

[hishitetsu]

LGTM

[yaira2]

Thank you