Update Window.cpp

Get rid of the use of System to turn key repeat back on

*It was necessary before because of design shortcomings that seem to have been fixed*

src/platform/linux/Window.cpp

@@ -1,4 +1,3 @@
-#include <cstdlib>
 #include <cstring>
 #include <ReWindow/types/Window.h>
 #include <ReWindow/types/Cursors.h>
@@ -54,14 +53,16 @@ void RWindow::Lower()
 }
 
 void RWindow::DestroyOSWindowHandle() {
-    Logger::Debug(std::format("Destroying window '{}'", this->title));
+    // Turn key repeat back on.
+    XAutoRepeatOn(platform->display);
+
+    Logger::Debug(std::format("Destroying sub-windows for window '{}'", this->title));
     XDestroySubwindows(platform->display, platform->window);
+
     Logger::Debug(std::format("Destroyed window '{}'", this->title));
     XDestroyWindow(platform->display, platform->window);
 
-    system("xset r on"); // Re-set X-server parameter to enable key-repeat.
-
-    open = false;
+    XCloseDisplay(platform->display);
 }
 
 //void RWindow::