CmdPal: Context menu on dock shows unusable shortcuts

### Microsoft PowerToys version

main

### Installation method

Dev build in Visual Studio

### Area(s) with issue?

Command Palette

### Steps to reproduce

The context menu for dock items shows keyboard shortcuts even when the corresponding actions cannot be invoked from there.

### ✔️ Expected Behavior

_No response_

### ❌ Actual Behavior

_No response_

### Upload Bug Report ZIP-file

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### Additional Information

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### Other Software

_No response_

Start by reproducing the issue in the Command Palette dock context menu and inspect how its actions and keyboard shortcuts are presented. The fix is complete when the menu no longer shows shortcuts for actions that cannot be invoked there; verify the behavior manually in the dev build.

Written by the indexing model from the issue text.