The binary value of multibyte characters is not displayed as expected in some of the widgets, which have option of Show value for binary item. For example, item history or item card widget.

Steps to reproduce:

1. Import host trapper_with_binary_item.yaml
2. Add Item history widget on the dashboard, select item: bin
3. Use base64 encoded value for trapper, for example: symbol: 🙂, encoded value: 8J+Zgg==
4. Start the server, send the value to trapper:

   ./bin/zabbix_sender -z 127.0.0.1 -s test -k trap -o '8J+Zgg=='
   

1. Observe results in latest data and item history widget for binary item

Result:
Latest data (display as plain text) contains the correct "8J+Zgg==" value.
Item history widget displays: "XDM2MFwyMzdcMjMxXDIwMg==", which looks like encoded "\360\237\231\202", which is the symbol "🙂" in UTF-8 octal representation.

See screenshot: 
Widget:

Latest data:

Expected:
Widget should display same value as latest data.
See screenshot from 7.0, for same scenario: