Bug: Right Click Menus appear too tall.

### Description

Right Click Menus assume max height as screen height if taskbar auto-hide is enabled. This makes it hard to use, as the menu flows behind the taskbar at times.
Request to limit MaxHeight of right click menu to 3/4 of screen height for better usability in general.

### Steps To Reproduce

1. Right click on a file, click on show more options.
2. Files window not maximized and taskbar auto-hide enabled.
3. Menu extends under taskbar at time

### Files Version

4.1.6.0

### Windows Version

Windows 11 Pro 26200.87373

### User ID

_No response_

### Log File

[BlankLogs.txt](https://github.com/user-attachments/files/29452900/BlankLogs.txt)

首先，按照 issue 中的步骤，在启用 taskbar 自动隐藏的 Windows 11 上复现右键菜单的行为。定位文件上下文菜单的实现，并检查其最大高度是如何确定的。完成的标准是菜单不再延伸到 taskbar 后面，并且在所描述的窗口状态下仍能正常运行。

由索引模型根据 Issue 内容生成。