Adapted to AE2 GuiAmount changes (#338)

Co-authored-by: boubou19 <[email protected]>

src/main/java/com/glodblock/github/client/gui/GuiPatternMulti.java

@@ -117,8 +117,9 @@ public class GuiPatternMulti extends GuiAmount {
     }
 
     @Override
-    protected long addOrderAmount(final int i) {
-        return i + getAmount();
+    protected void addAmount(int i) {
+        this.amountTextField.setText(Long.toString(i + getAmount()));
+        this.amountTextField.setCursorPositionEnd();
     }
 
     @Override