Generic filters are suggested for elements whitelisted by a generic hide / block filter exception

[kzar]

Environment

The development build of the Adblock Plus for Firefox extension.

How to reproduce

(Steps as reported by mapx in a discussion on #647)

1. Browse to ​http://www.footmercato.net/ligue1/calendrier
2. Add this filter @@||footmercato.net^$genericblock
3. Open the blockable items list
4. Select one of the items that was actually whitelisted by the genericblock exception. (For example ​http://www.badibadou.eu/jk7dlkfe.js?auto=1&advid=5
5. Click to generate a blocking rule for this item.

Observed behaviour

A generic blocking rule is suggested, which will not work.

Expected behaviour

A specific blocking rule should be suggested instead.

[trev]

I'm setting priority to P4 for now. Sure, our tools don't know how to deal with these exceptions properly - but at the current stage such exceptions are experimental. We want to see whether they work in general, tool support isn't important.

[trev]

Mass-closing all bugs in Adblock Plus for Firefox module, the codebase of Adblock Plus 3.0 belongs into Platform and User-Interface modules. Old bugs are unlikely to still apply.