An helper to be able to use the Unity Progress Bar with background or async operations

ProgressBarHelper

[UnityEditor.InitializeOnLoad]
public class ProgressBarHelper
{
    #region Methods

    protected static List<Action> actions = new List<Action>();

    static ProgressBarHelper()
    {
        UnityEditor.EditorApplication.update += Update;
    }

    private static void Update()
    {
        while(actions.Count > 0)
        {
            actions[0].Invoke();
            actions.RemoveAt(0);
        }
    }

    public static void DisplayProgressBar(string _title, string _description, float _progress)
    {
        actions.Add(() => EditorUtility.DisplayProgressBar(_title, _description, _progress));
    }

    public static void ClearProgressBar()
    {
        actions.Add(() => EditorUtility.ClearProgressBar());
    }

    #endregion