Add deprecated messages to FrmAppHelper::icon_by_class - #3321

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: actions/checkout@v4.1.1. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/

Use strict assertions in PHPUnit tests. >Non-strict assertion `assertEquals` is used here. Help: Replace `assertEquals` with `assertSame` to enforce strict comparisons in your tests.

Use strict assertions in PHPUnit tests. >Non-strict assertion `assertEquals` is used here. Help: Replace `assertEquals` with `assertSame` to enforce strict comparisons in your tests.

Use strict assertions in PHPUnit tests. >Non-strict assertion `assertEquals` is used here. Help: Replace `assertEquals` with `assertSame` to enforce strict comparisons in your tests.