Refratoring set Border to loweredbevel

src/main/java/BattleShip/AIGridGUI.java

@@ -522,13 +522,13 @@ public class AIGridGUI extends JPanel {
                     BSButton bsb = buttons.get(cell.getGridLocation() + (i * columns));
                     //If mouse entered, highlight cells via lowered bevel.
                     if(action == 1) {
-                        bsb.setBorder(raisedbevel);
+                        bsb.setBorder(loweredBevel);
                     } else {
                         //If mouse released, place ship and color ship cells.
                         if(action == 2) {
                             bsb.setCellContents(shipToPlace);
                             bsb.setBackground(Color.blue);
-                            bsb.setBorder(raisedbevel);
+                            bsb.setBorder(loweredBevel);
                         } else {
                             //If mouse exited, unhighlight cells.
                             bsb.setBorder(compound);