use webxdc app name in chatlist/quotes/replies/etc

this uses `get_webxdc_info().name` for chatlist etc.
the previuosly used static strings comes from a time
where we just did not had the correct name.

i was also thinking about adding `get_webxdc_info().summary`,
however, as this information is dynamic,
that may open several issues, eg. quoted text may change
so that the answer is out of context.

CHANGELOG.md

@@ -2,6 +2,9 @@
 
 ## 1.72.0
 
+### Changes
+- use webxdc app name in chatlist/quotes/replies etc. #3027
+
 ### Fixes
 - run migrations on backup import #3006