add close current tab to unity editor. Use with shortcut manager. Use with editor shortcut setup. For example "ctrl+w to close current active panel"

EditorCloseWindowTab.cs

using UnityEngine;
using UnityEditor;

public class EditorCloseWindowTab : Editor
{
    [MenuItem("Shortcuts/Close Window Tab")]
    static void CloseTab()
    {
        EditorWindow focusedWindow = EditorWindow.focusedWindow;
        if (focusedWindow != null)
        {
            CloseTab(focusedWindow);
        }
        else
        {
            Debug.LogWarning("Found no focused window to close");
 
        }
    }
    static void CloseTab(EditorWindow editorWindow)
    {
        editorWindow.Close();
    }
}