Quick Save Button is not aligned with Quick Load Button

Reported on discord.

> is the quick save/load buttons being aligned like this normal?
> 

I checked and in the ['MainUI' image](https://github.com/07th-mod/ui-editing-scripts/blob/master/assets/images/shared/MainUI.png), the button is indeed 1 pixel too high compared to the vanilla button.


I'm pretty sure only the top two 'quick save' buttons need to be changed, the bottom four buttons are fine.

該 issue 是關於「快速儲存」按鈕圖像與「快速載入」按鈕相比存在 1 像素的錯位問題。需要編輯的圖像是 assets/images/shared 目錄下的 'MainUI.png'。請直觀比較按鈕位置，調整頂部的兩個「快速儲存」按鈕以與「快速載入」按鈕對齊，並確保底部的四個按鈕保持不變。測試包括在遊戲的 UI 上下文中檢查編輯後的圖像。

由索引模型根據 Issue 內容生成。