[Bug]: Merge duplicated customers doesn't work

[eraush]

Expected behavior

Customers are merged and removed from the Current tab
Counter of duplicated customers is decreased by one

Actual behavior

Refused to execute inline event handler because it violates the following Content Security Policy directive: "script-src 'self' 'nonce-qu+vQP5Gd85Mqj0N6eO3v1MFLxgdb71h' 'unsafe-inline' 'unsafe-eval' https://buttons.github.io/buttons.js". Note that 'unsafe-inline' is ignored if either a hash or nonce value is present in the source list.

merge.duplicates.mp4

Steps to reproduce

Steps to reproduce:

1. Login with admin user
2. Navigate to Customer Management Framework > Customer Duplicates
3. Click Merge button

[dvesh3]

Fixed by #477