private void moveDownToolStripMenuItem_Click(object sender, EventArgs e)
{
int index = Repositories.RepositoryCategories.IndexOf(RepositoryCategory);
Repositories.RepositoryCategories.Remove(RepositoryCategory);
Repositories.RepositoryCategories.Insert(Math.Min(index + 1, Repositories.RepositoryCategories.Count), RepositoryCategory);
dashboardCategoryChanged(this, null);
}