Reduces visibility of internal fields/methods

Reduces the visibility of all fields to private and create setters/getters
when necessary. Exceptions are fields with GuiSync as these need to be
public.

Reduces the visibility of internal methods to private/protected/default when possible.

src/main/java/appeng/core/localization/ButtonToolTips.java

@@ -65,7 +65,7 @@ public enum ButtonToolTips
 
 	SchedulingMode, SchedulingModeDefault, SchedulingModeRoundRobin, SchedulingModeRandom;
 
-	final String root;
+	private final String root;
 
 	ButtonToolTips()
 	{

src/main/java/appeng/core/localization/GuiText.java

@@ -94,7 +94,7 @@ public enum GuiText
 	// Used in a ME Interface when no appropriate TileEntity was detected near it
 	Nothing;
 
-	final String root;
+	private final String root;
 
 	GuiText()
 	{

src/main/java/appeng/core/localization/WailaText.java

@@ -32,7 +32,7 @@ public enum WailaText
 
 	Contains, Channels;
 
-	final String root;
+	private final String root;
 
 	WailaText()
 	{