Add the ability to be able to create stock feed rules using bundled SKU's

Client sells 95% of his products as bundles (same item in different quantities) and stock feed rules does not send a feed to selling channel for all the bundles associated with the component SKU.

Adding this could prevent a lot of oversales for a lot of mintsoft users as.

Currently we have to quarantine 10% of all SKU's to prevent oversales on multiple channels and staying on top of this is a lot of unnecessary working hours. I know for a fact Linnworks has the ability to freeze their stock on % level so for e.g. only 90% off all stock will show across all off their channels which helps Linnworks users to prevent oversales.