Fix coding standards

DrupalPractice code sniffing standard revealed more errors and warnings to fix.

WARNING | Global constants should not be used, move it to a class or interface

To address this warning, one possible solution is to create a distinct class for the constants and subsequently employ that class within the .module. I refrained from pushing the modifications as there is only a single constant variable. I am uncertain whether it is acceptable to disregard the warning or if it is necessary to establish a separate class to resolve it.

I think nightwatch tests are failing. Therefore readding WebAssert warning fix.

Thanks @nitin_lama for working on this.

I'll continue from here.

The Nightwatch testing fail seems unrelated.

Auto-tests pass. Manual testing remains.

Automatically closed - issue fixed for 2 weeks with no activity.