Fix Awake's popup context menu positioning (#41009)

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fix/what does it change/how was it tested (even manually, if necessary)?
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## Summary of the Pull Request
Fix for issue #37457. The Awake popup context menu would show at the
wrong position, especially after adding additional displays. The reason
this happened was that the mouse cursor position was unnecessarily
converted from screen to to client-area coordinates.

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## PR Checklist

- [x] Closes: #37457
- [ ] **Communication:** I've discussed this with core contributors
already. If the work hasn't been agreed, this work might be rejected
- [ ] **Tests:** Added/updated and all pass
- [ ] **Localization:** All end-user-facing strings can be localized
- [ ] **Dev docs:** Added/updated
- [ ] **New binaries:** Added on the required places
- [ ] [JSON for
signing](https://github.com/microsoft/PowerToys/blob/main/.pipelines/ESRPSigning_core.json)
for new binaries
- [ ] [WXS for
installer](https://github.com/microsoft/PowerToys/blob/main/installer/PowerToysSetup/Product.wxs)
for new binaries and localization folder
- [ ] [YML for CI
pipeline](https://github.com/microsoft/PowerToys/blob/main/.pipelines/ci/templates/build-powertoys-steps.yml)
for new test projects
- [ ] [YML for signed
pipeline](https://github.com/microsoft/PowerToys/blob/main/.pipelines/release.yml)
- [ ] **Documentation updated:** If checked, please file a pull request
on [our docs
repo](https://github.com/MicrosoftDocs/windows-uwp/tree/docs/hub/powertoys)
and link it here: #xxx

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or any additional comments/features here -->
## Detailed Description of the Pull Request / Additional comments

<!-- Describe how you validated the behavior. Add automated tests
wherever possible, but list manual validation steps taken as well -->
## Validation Steps Performed
Ran Awake and its context menu seemed to display properly and at the
correct position.

---------

Co-authored-by: Leon Zandman <lzandman@rdw.nl>

src/modules/awake/Awake/Core/Native/Bridge.cs

@@ -88,9 +88,6 @@ namespace Awake.Core.Native
         [return: MarshalAs(UnmanagedType.Bool)]
         internal static extern bool GetCursorPos(out Point lpPoint);
 
-        [DllImport("user32.dll", SetLastError = true)]
-        internal static extern bool ScreenToClient(IntPtr hWnd, ref Point lpPoint);
-
         [DllImport("user32.dll", SetLastError = true)]
         internal static extern bool GetMessage(out Msg lpMsg, IntPtr hWnd, uint wMsgFilterMin, uint wMsgFilterMax);
 

src/modules/awake/Awake/Core/TrayHelper.cs

@@ -61,9 +61,8 @@ namespace Awake.Core
 
             Bridge.SetForegroundWindow(hWnd);
 
-            // Get cursor position and convert it to client coordinates
+            // Get cursor position in screen coordinates
             Bridge.GetCursorPos(out Models.Point cursorPos);
-            Bridge.ScreenToClient(hWnd, ref cursorPos);
 
             // Set menu information
             MenuInfo menuInfo = new()