Tastudio - don't open the context menu when user right-clicks a column header

BizHawk.Client.EmuHawk/tools/TAStudio/InputRoll.cs

@@ -335,6 +335,16 @@ namespace BizHawk.Client.EmuHawk
 			}
 		}
 
+		[Browsable(false)]
+		[DesignerSerializationVisibilityAttribute(DesignerSerializationVisibility.Hidden)]
+		public bool IsPointingAtColumnHeader
+		{
+			get
+			{
+				return IsHoveringOnColumnCell;
+			}
+		}
+
 		[Browsable(false)]
 		[DesignerSerializationVisibilityAttribute(DesignerSerializationVisibility.Hidden)]
 		public int? FirstSelectedIndex

BizHawk.Client.EmuHawk/tools/TAStudio/TAStudio.ListView.cs

@@ -260,7 +260,7 @@ namespace BizHawk.Client.EmuHawk
 
 		private void TasView_MouseUp(object sender, MouseEventArgs e)
 		{
-			if (e.Button == MouseButtons.Right && !_supressContextMenu)
+			if (e.Button == MouseButtons.Right && !TasView.IsPointingAtColumnHeader && !_supressContextMenu)
 			{
 				RightClickMenu.Show(TasView, e.X, e.Y);
 			}