fix qr-code display (#3295)

* tagger.put_raw() has changes sematics and escapes strings on its own now

an explicit escaping leads to double escaping and to wrong display.

this should also improve lenght calculation,
as a quote and other specials counts as 1 character and not as 4-6.

* test encoding of generated qr-code-svg

* streamline function argument wording

use qrcode_description instead of raw_qrcode_description -
there is nothing "raw" in the argument,
it is a string as used throughout the app.

CHANGELOG.md

@@ -1,5 +1,10 @@
 # Changelog
 
+## Unreleased
+
+### Fixed
+- fix escaping in generated QR-code-SVG #3295
+
 ## 1.79.0
 
 ### Changes