Trim() private method

Trim the glyphs, making sure they never go past the trimmed texture bounds.
private Trim ( ) : void
return void
 public void Validate()
 {
     Host        = string.IsNullOrWhiteSpace(Host) ? DEFAULT_HOST : Host.Trim();
     Port        = Math.Min(Math.Max(Port, (ushort)1), ushort.MaxValue);
     GameFont    = string.IsNullOrWhiteSpace(GameFont) ? DEFAULT_FONT : GameFont.Trim();
     UIFont      = string.IsNullOrWhiteSpace(UIFont) ? DEFAULT_UI_FONT : UIFont.Trim();
     ChatLines   = Math.Min(Math.Max(ChatLines, 10), 500);
     IntroImages = new List <string>(IntroImages?.Distinct() ?? new List <string>());
 }