[win32] Fix DnD across multiple monitors

[akoch-yatta]

This PR addresses issues, when DnD across multiple monitors with monitors specific scaling is used. If the monitors have different zoom dragging into a table or tree on the second monitor will detect the wrong destination items depending on the zoom. To address this the zoom should always be inherited from the underlying control if available.

How to test

Test setup

Monitor setup with two different monitors:

• Primary should be the smaller zoom (e.g. 100)
• Secondary should be the bigger zoom (e.g. 150)
• Start the runtime IDE with monitor specific scaling active

Test scenario

1. Open and position the IDE on the secondary monitor and the File explorer on the primary monitor
2. Open the Project explorer with at least one project to drag into
3. Drag a file from the File explorer over to the project
4. You will notice the hover overlay does not highlight the correct entry

[github-actions]

Test Results

   539 files  ±0     539 suites  ±0   37m 53s ⏱️ + 8m 56s
 4 330 tests ±0   4 320 ✅ ±0    9 💤 ±0  1 ❌ ±0 
16 579 runs  ±0  16 477 ✅ ±0  101 💤 ±0  1 ❌ ±0 

For more details on these failures, see this check.

Results for commit 9fd4c4a. ± Comparison against base commit 0f21a6e.

♻️ This comment has been updated with latest results.