Fix gray background not showing in terminal storage

Author: rubensworks

src/main/java/org/cyclops/integratedterminals/client/gui/container/ContainerScreenTerminalStorage.java

@@ -266,7 +266,7 @@ protected int getPlayerInventoryOffsetY() {
 
     @Override
     public void extractBackground(GuiGraphicsExtractor guiGraphics, int mouseX, int mouseY, float f) {
-        //super.extractBackground(guiGraphics, mouseX, mouseY, f);
+        this.extractTransparentBackground(guiGraphics);
         this.renderBgTab(guiGraphics, f, mouseX, mouseY);
         this.renderBgPlayerInventory(guiGraphics, f, mouseX, mouseY);