Wrong coding of special characters / accents

I just created a second installation of OH2 using OpenHabian. Looks good - but:

In ClassicUI I cannot get the degrees celcius symbol “°C” shown correctly. It just gives me a rhombus-symbol with a questionmark and then the capital C. I guess other special/accented characters would also show strangely…

Where do I correct settings for this ?

My settings file is identical to one used on my primary system - where OH2 shows everything nicely.

I managed to fix this myself: it turned out to be wrong encoding of the .items and .sitemap files I had created using notepad++ from scratch in the new setup. I simply did a “convert to UTF-8” and saved the file again - and voila !