Closes #12 Added visual lock state to monitors

Some general refactoring of every monitor including panels and terminals.
Disabled glPushAttrib and glPopAttrib for StorageMonitor as this can be a
performance issue.

src/main/java/appeng/parts/reporting/PartInterfaceTerminal.java

@@ -28,15 +28,15 @@ import appeng.core.sync.GuiBridge;
 import appeng.util.Platform;
 
 
-public class PartInterfaceTerminal extends PartMonitor
+public class PartInterfaceTerminal extends AbstractPartDisplay
 {
+	private static final CableBusTextures FRONT_BRIGHT_ICON = CableBusTextures.PartInterfaceTerm_Bright;
+	private static final CableBusTextures FRONT_DARK_ICON = CableBusTextures.PartInterfaceTerm_Dark;
+	private static final CableBusTextures FRONT_COLORED_ICON = CableBusTextures.PartInterfaceTerm_Colored;
+
 	public PartInterfaceTerminal( ItemStack is )
 	{
-		super( is, true );
-
-		this.frontBright = CableBusTextures.PartInterfaceTerm_Bright;
-		this.frontColored = CableBusTextures.PartInterfaceTerm_Colored;
-		this.frontDark = CableBusTextures.PartInterfaceTerm_Dark;
+		super( is );
 	}
 
 	@Override
@@ -59,4 +59,22 @@ public class PartInterfaceTerminal extends PartMonitor
 
 		return false;
 	}
+
+	@Override
+	public CableBusTextures getFrontBright()
+	{
+		return FRONT_BRIGHT_ICON;
+	}
+
+	@Override
+	public CableBusTextures getFrontColored()
+	{
+		return FRONT_COLORED_ICON;
+	}
+
+	@Override
+	public CableBusTextures getFrontDark()
+	{
+		return FRONT_DARK_ICON;
+	}
 }