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)

Start by reproducing the right-click menu behavior on Windows 11 with taskbar auto-hide enabled, using the steps in the issue. Locate the implementation of the file context menu and inspect how its maximum height is determined. Done means the menu no longer extends behind the taskbar and still behaves correctly in the described window state.

索引モデルが issue の本文から書いたものです。