onConfigureClosed (#6523)

* onConfigureClosed

* Run the closing of the previous block's config on the opening of another

core/src/mindustry/entities/comp/BuildingComp.java

@@ -1249,6 +1249,11 @@ abstract class BuildingComp implements Posc, Teamc, Healthc, Buildingc, Timerc,
         return self() != other;
     }
 
+    /**
+     * Called when this block's config menu is closed
+     */
+    public void onConfigureClosed(){}
+
     /** Returns whether this config menu should show when the specified player taps it. */
     public boolean shouldShowConfigure(Player player){
         return true;