Allow third-party modules to modify the list of filters / rules

The first part of the code has been implemented.

It has completely implemented.

I am adding the needed tags to mark the differences between beta1, and beta2.

The code has been removed, and it needs to be re-engineered; rather that allowing third-party modules to add fiters / rules the user cannot edit, the module should allow the other modules to change the already existing filters / rules.

I am not even sure that to allow other modules to modify the existing filters / rules makes any sense; I cannot find a single use case where such feature could be of any help.

Rather than implementing this, it will be implemented a page that help in creating a replacement rule, where third-party modules can add their presets (see #511132: Add a form field that allows to add preset regular expressions).