Create WindowColour enum for widget definition calls (#12722)

* Make MakeWidget* functions take enum colour

* Make windows A-D use WindowColour enum

* Make windows E-G use WindowColour enum

* Make windows I-M use WindowColour enum

* Make windows N-P use WindowColour enum

* Make windows R-S use WindowColour enum

* Make windows T use WindowColour enum

* Make windows V-W use WindowColour enum

src/openrct2-ui/windows/Error.cpp

@@ -23,7 +23,7 @@ enum {
 };
 
 static rct_widget window_error_widgets[] = {
-    MakeWidget({0, 0}, {200, 42}, WWT_IMGBTN, 0),
+    MakeWidget({0, 0}, {200, 42}, WWT_IMGBTN, WindowColour::Primary),
     { WIDGETS_END }
 };