If there is an overflow, we must scroll.
However, when starting to drag a button in order to move it, scrolling does not work.
未設定先決條件。
被阻擋的使用者不會看到這個附註。
刪除分支是永久的。雖然被刪除的分支可能會在實際移除前繼續存在一段時間，但在大多數情況下無法撤銷。是否繼續？
If there is an overflow, we must scroll.
However, when starting to drag a button in order to move it, scrolling does not work.