Bugfixes:
* [#2574} Construction Marker issues (asie)
* [#2566] ConcurrentModificationException on Planter (hea3ven)
* Broken alternate sealant recipe config option (Unh0lyTigg)
* Planters sometimes not finding valid blocks (hea3ven)
* Potential fix for block breaking robots hanging up on air blocks (Kubuxu)
