Hex Editor - better location for the poke dialog, don't attempt to highlight non-visible addresses (fixes some bad drawing when highlighting and scrolling)

BizHawk.Client.EmuHawk/tools/HexEditor/HexEditor.cs

@@ -1458,7 +1458,7 @@ namespace BizHawk.Client.EmuHawk
 			{
 				var poke = new RamPoke
 				{
-					InitialLocation = PointToScreen(GetAddressCoordinates(addresses[0])),
+					InitialLocation = this.ChildPointToScreen(AddressLabel),
 					ParentTool = this
 				};
 
@@ -1984,6 +1984,8 @@ namespace BizHawk.Client.EmuHawk
 			}
 
 			foreach (var address in _secondaryHighlightedAddresses)
+			{
+				if (IsVisible(address))
 				{
 					var point = GetAddressCoordinates(address);
 					var textX = (int)GetTextX(address);
@@ -2005,6 +2007,7 @@ namespace BizHawk.Client.EmuHawk
 						e.Graphics.FillRectangle(new SolidBrush(Color.FromArgb(0x77FFD4D4)), textrect);
 					}
 				}
+			}
 
 			if (HasNibbles())
 			{