Config.MainFormMouseCaptureForcesTopmost (config -> display -> window)

useful when some obscure window can overlay bizhawk while in mouse capture mode if the hidden mouse pointer is too close to it (pop-up panel on the edge of the screen in my case). topmost+fullscreen makes those unreachable, but automatic topmost is set to false since normally it's potentially bad

Author: vadosnaprimer

src/BizHawk.Client.Common/config/Config.cs

@@ -169,6 +169,7 @@ public void SetWindowScaleFor(string sysID, int windowScale)
 		public string UpdateIgnoreVersion { get; set; } = "";
 		public bool SkipOutdatedOsCheck { get; set; }
 		public bool CaptureMouse { get; set; } = false;
+		public bool MainFormMouseCaptureForcesTopmost { get; set; } = false;
 
 		public bool SkipSuperuserPrivsCheck { get; set; }
 

src/BizHawk.Client.EmuHawk/MainForm.cs

@@ -4910,13 +4910,23 @@ private void CaptureMouse(bool wantCapture)
 				_presentationPanel.Control.Cursor = Properties.Resources.BlankCursor;
 				_cursorHidden = true;
 				BringToFront();
+
+				if (Config.MainFormMouseCaptureForcesTopmost)
+				{
+					TopMost = true;
+				}
 			}
 			else
 			{
 				Cursor.Clip = Rectangle.Empty;
 				Cursor.Show();
 				_presentationPanel.Control.Cursor = Cursors.Default;
 				_cursorHidden = false;
+
+				if (Config.MainFormMouseCaptureForcesTopmost)
+				{
+					TopMost = Config.MainFormStayOnTop;
+				}
 			}
 
 			// Cursor.Clip is a no-op on Linux, so we need this too