How to reproduce:
1. Open attached "ProfileAnalyzer" project
2. Open Preferences by going to Edit->Preferences
3. Switch to Professional Editor Theme by choosing General option on the left and changing Editor Theme to Professional found on the right
4. Open Profile Analyzer found in Window->Analysis->Profile Analyzer
5. Load the user's attached data
6. Open Preferences by going to Edit->Preferences
7. Switch to Personal Editor Theme by choosing General option on the left and changing Editor Theme to Personal found on the right

Expected result: "Analysis Type", "Units" and "Marker Columns" text color changes to black
Actual result: "Analysis Type", "Units" and "Marker Columns" text stays white from the previous theme

Reproducible with: 0.4.0-preview.3, 0.6.0-preview.1 (2017.4.39f1, 2018.4.20f1, 2019.3.10f1, 2020.1.0b5, 2020.2.0a7)
Could not test with: 2017.4.39f1 (0.4.0-preview.3, 0.4.0-preview.5, 0.4.0-preview.6) because of namespace error

Note: The text retains black color from Personal Editor Theme if the project was opened initially using Personal Editor Theme and change to Professional Editor Theme