We have successfully migrated our application to PB2019 and have also implemented the option to change theme.
But why is the titlebar on the windows left unaltered?
Here is our application using the "Flat Design Dark" theme and Microsoft File Explorer on top using Windows 10 "Dark mode":
Some of the design issues on the controls is our problem (transparency and such), but the titlebar, menubar and menus should follow the theme in my opinion.
Now it's a mix of themes and not.
Maritech Systems AS