Steps to reproduce:
1. Open the attached “IN-153048_IMGUI_TEST_2.zip” project
2. Open Window → AdvancedDropdown Icon Repro
3. Press SceneAsset → Without icon
4. Observe the size of the window
5. Press SceneAsset → With icon
6. Observe the size of the window
Actual result: The AdvancedDropdown popup with an icon is excessively wide
Expected result: The AdvancedDropdown popup is rendered without a large amount of empty space
Reproducible with: 6000.0.0f1, 6000.0.83f1, 6000.3.24f1, 6000.6.1f1, 6000.7.0a6
Reproducible on: macOS Sequoia 15.7.9 (M1 Max)
Not reproducible on: No other environments tested