Potential data races in `TestCaseDisplayService.returnOriginalEditorBackground`

[Vladislav0Art]

Describe the bug The method has the following implementation:

private fun returnOriginalEditorBackground(editor: EditorTextField) {
    Thread {
        Thread.sleep(10000)
        editor.background = defaultEditorColor // <- non-atomic + no mutex lock
    }.start()
}

1. The editor.background is not atomic or covered with a mutex lock before the modification. There is room for data races here, which may not manifest themselves due to a lack of thread contention.

[ChatGPT]: Accessing and modifying UI components from a background thread can cause thread safety issues. In many GUI frameworks, UI components should only be accessed and modified from the main (UI) thread. Modifying them from a background thread can lead to race conditions, crashes, or undefined behavior.

Expected behavior No space for the data race must be available.