Improvements to the usability of the number entry widgets (Priority, Level Emitter, Craft Amount): (#4737)

- Fixed tab order
- Introduced focus state for corner buttons
- Allowed the player to enter any text, but add validation that only persist it if it is a valid number
- Enter will now confirm these dialogs and return to the previous dialog
- The text field is automatically focused and its contents are selected

src/main/java/appeng/client/gui/implementations/CraftingStatusScreen.java

@@ -57,7 +57,7 @@ public class CraftingStatusScreen extends CraftingCPUScreen<CraftingStatusContai
 
         subGui.addBackButton(btn -> {
             addButton(btn);
-            btn.setHideEdge(13);
+            btn.setHideEdge(true);
         }, 213, -4);
     }