tastudio: color frame column the same as player 2.

this visually separates frame number column from input.
could have been done by aligning frame text to the right, but it's not possible right now.

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

@@ -144,6 +144,8 @@ namespace BizHawk.Client.EmuHawk
 			{
 				if (Emulator.Frame != index && CurrentTasMovie.Markers.IsMarker(index))
 					color = Marker_FrameCol;
+                else
+                    color = Color.FromArgb(32, 0, 0, 0); // same as players 2 and 4
 			}
 			else if (index == _floatEditRow && columnName == _floatEditColumn)
 			{ // SuuperW: Analog editing is indicated by a color change.