Bug 61190 - Restrict visibility of the Display keys group methods

The findLatinKeyGroup() method must have the private visibility as an
internal function of the Display class.

The getLatinKeyGroup() method must have the package-private visibility
as an internal function of the SWT.

Signed-off-by: Andrey Mozzhuhin <amozzhuhin@yandex.ru>
diff --git a/bundles/org.eclipse.swt/Eclipse SWT/gtk/org/eclipse/swt/widgets/Display.java b/bundles/org.eclipse.swt/Eclipse SWT/gtk/org/eclipse/swt/widgets/Display.java
index f307ec8..ab74e30 100644
--- a/bundles/org.eclipse.swt/Eclipse SWT/gtk/org/eclipse/swt/widgets/Display.java
+++ b/bundles/org.eclipse.swt/Eclipse SWT/gtk/org/eclipse/swt/widgets/Display.java
@@ -1110,7 +1110,7 @@
  *
  * @return the most Latin keyboard layout group
  */
-protected int findLatinKeyGroup () {
+private int findLatinKeyGroup () {
 	int result = 0;
 	Map<Integer, Integer> groupKeysCount = new HashMap<> ();
 	long /*int*/ keymap = OS.gdk_keymap_get_default ();
@@ -1154,10 +1154,8 @@
 
 /**
  * Return the most Latin keyboard layout group.
- *
- * @noreference This method is not intended to be referenced by clients.
  */
-public int getLatinKeyGroup () {
+int getLatinKeyGroup () {
 	return latinKeyGroup;
 }