How to see that a file is modified?

Hi all,

I'm using kdevelop 5.2.1 on kubuntu 18.04.
I'm happy so far beside one real big tradeoff compared to earlier versions: I
don't see anywhere that a file got modified and needs to be saved! In older
versions there was a symbol in front of the filename in the top tab that showed
up the not yet saved modification and IIRC there was an asterisk beside the
filename in the title bar.

How can I reactivate that feature? I went through multiple config dialogs
without real success. Maybe I just didn't see the settings.

Same issue with kate on the same system.

Thanks!

Best regards,

Erik