[3.4.2] UI: Fixed height and console error for Event filter panel

[ArtemDzhereleiko]

Pull Request description

Issue: #7470

Fixed height event filter panel.

General checklist

• You have reviewed the guidelines document.
• PR name contains fix version. For example, "[3.3.4] Hotfix of some UI component" or "[3.4] New Super Feature".
• The milestone is specified and corresponds to fix version.
• Description references specific issue.
• Description contains human-readable scope of changes.
• Description contains brief notes about what needs to be added to the documentation.
• No merge conflicts, commented blocks of code, code formatting issues.
• Changes are backward compatible or upgrade script is provided.
• Similar PR is opened for PE version to simplify merge. Required for internal contributors only.

Front-End feature checklist

• Screenshots with affected component(s) are added. The best option is to provide 2 screens: before and after changes;
• If you change the widget or other API, ensure it is backward-compatible or upgrade script is present.
• Ensure new API is documented here