Fixed some disabled image buttons being 'clickable'

core/src/mindustry/ui/Styles.java

@@ -276,6 +276,7 @@ public class Styles{
             imageCheckedColor = Color.white;
             imageDownColor = Color.white;
             imageUpColor = Color.gray;
+            imageDisabledColor = Color.darkGray;
         }};
         selecti = new ImageButtonStyle(){{
             checked = buttonSelect;

core/src/mindustry/ui/dialogs/MapListDialog.java

@@ -2,7 +2,6 @@ package mindustry.ui.dialogs;
 
 import arc.*;
 import arc.graphics.*;
-import arc.input.KeyCode;
 import arc.scene.style.*;
 import arc.scene.ui.*;
 import arc.scene.ui.layout.*;