Fix WFO0003: Migrate DPI configuration from manifest to project property

[Copilot]

The compiler emits warning WFO0003 when DPI awareness is configured via App.manifest instead of the modern project property approach.

Changes

• ContextMenuManager.csproj: Added <ApplicationHighDpiMode>SystemAware</ApplicationHighDpiMode> property
• App.manifest: Removed deprecated <application><windowsSettings><dpiAware> section

The SystemAware mode maintains identical DPI behavior to the previous <dpiAware>true</dpiAware> configuration.

Original prompt

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This section details on the original issue you should resolve

<issue_title>[Bug]: Fix CSC : warning WFO0003: Remove high DPI settings from D:\a\ContextMenuManager\ContextMenuManager\ContextMenuManager\Properties\App.manifest and configure via Application.SetHighDpiMode API or 'ApplicationHighDpiMode' project property</issue_title>
<issue_description>### Checklist

• This bug has not already been reported (search here)
• I have updated ContextMenuManager to the latest version
• I understand that any issue not following the guidelines may be closed directly

Windows

Windows 11

Version

3.6.1.0

Steps to Reproduce

CSC : warning WFO0003: Remove high DPI settings from D:\a\ContextMenuManager\ContextMenuManager\ContextMenuManager\Properties\App.manifest and configure via Application.SetHighDpiMode API or 'ApplicationHighDpiMode' project property

Crash logs

.</issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes [Bug]: Fix CSC : warning WFO0003: Remove high DPI settings from D:\a\ContextMenuManager\ContextMenuManager\ContextMenuManager\Properties\App.manifest and configure via Application.SetHighDpiMode API or 'ApplicationHighDpiMode' project property #83

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