added merge tu grid Panel

moved borders to external components
added text field for one line with select

src/Sudoku/SudokuButton.java

@@ -0,0 +1,37 @@
+package Sudoku;
+
+import guiTree.Animations.ColorAnimation;
+import guiTree.Components.ToggleButton;
+import guiTree.events.KeyAdapter;
+
+import java.awt.*;
+import java.awt.event.KeyEvent;
+
+public class SudokuButton extends ToggleButton {
+    private int number;
+    private boolean entered;
+    private boolean fixed;
+    private boolean toggle;
+
+    public SudokuButton(Boolean fixed) {
+        super();
+        this.fixed = fixed;
+        if(!fixed) {
+            addKeyListener(new SudokuKeyListener());
+        }
+    }
+
+    private class SudokuKeyListener extends KeyAdapter {
+        @Override
+        public void keyPressed(KeyEvent keyEvent) {
+            if(keyEvent.getKeyCode() >= 48 && keyEvent.getKeyCode() <= 57) {
+                setLabel(String.valueOf(keyEvent.getKeyCode() - 48));
+            }
+            else {
+                addAnimation(new ColorAnimation(SudokuButton.this, Color.RED, getBackgroundColor(), 100));
+            }
+            setPressed(false);
+            update();
+        }
+    }
+}