Center windows by default

Author: MaartenS11

src/main/kotlin/be/ugent/topl/mio/ui/InteractiveDebugger.kt

@@ -347,6 +347,7 @@ class InteractiveDebugger(
                 debugger.close()
             }
         })
+        setLocationRelativeTo(null)
         defaultCloseOperation = EXIT_ON_CLOSE
         isVisible = true
     }

src/main/kotlin/be/ugent/topl/mio/ui/StartScreen.kt

@@ -16,6 +16,7 @@ import javax.swing.*
 
 open class StartScreen(config: DebuggerConfig) : AboutScreen(config) {
     init {
+        setLocationRelativeTo(null)
         defaultCloseOperation = EXIT_ON_CLOSE
     }