add hidden MaxFPS settings to ra/d2k GUI

OpenRA.Mods.RA/Widgets/Logic/SettingsMenuLogic.cs

@@ -134,6 +134,13 @@ namespace OpenRA.Mods.RA.Widgets.Logic
 				Game.viewport.Zoom = gs.PixelDouble ? 2 : 1;
 			};
 
+			var capFrameRateCheckbox = display.Get<CheckboxWidget>("CAPFRAMERATE_CHECKBOX");
+			capFrameRateCheckbox.IsChecked = () => gs.CapFramerate;
+			capFrameRateCheckbox.OnClick = () => gs.CapFramerate ^= true;
+
+			var maxFrameRate = display.Get<TextFieldWidget>("MAX_FRAMERATE");
+			maxFrameRate.Text = gs.MaxFramerate.ToString();
+
 			// Keys
 			var keys = bg.Get("KEYS_PANE");
 			var keyConfig = Game.Settings.Keys;
@@ -225,6 +232,7 @@ namespace OpenRA.Mods.RA.Widgets.Logic
 				int.TryParse(windowWidth.Text, out x);
 				int.TryParse(windowHeight.Text, out y);
 				gs.WindowedSize = new int2(x,y);
+				int.TryParse(maxFrameRate.Text, out gs.MaxFramerate);
 				Game.Settings.Save();
 				Ui.CloseWindow();
 			};

mods/ra/chrome/settings.yaml

@@ -264,6 +264,18 @@ Background@SETTINGS_MENU:
 					Height:20
 					Font:Regular
 					Text:Enable Pixel Doubling
+				Checkbox@CAPFRAMERATE_CHECKBOX:
+					Y:120
+					Width:200
+					Height:20
+					Font:Regular
+					Text:Cap Framerate @ 
+				TextField@MAX_FRAMERATE:
+					X:150
+					Y:120
+					Width:45
+					Height:25
+					MaxLength:3
 		Container@KEYS_PANE:
 			X:37
 			Y:100