Add chat counts to chart header

[IgorKrupenja]

Related tasks:

• https://github.com/buerokratt/Analytics-Module/issues/331
• https://github.com/buerokratt/Analytics-Module/issues/332
• https://github.com/buerokratt/Analytics-Module/issues/333
• https://github.com/buerokratt/Analytics-Module/issues/334
• https://github.com/buerokratt/Analytics-Module/issues/335

Since this is basically a single change, makes sense implementing all these in one PR.

[sonarcloud[bot]]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud