fix crash when both dlc 2 & 4 not installed

Compatibility with the new U56 beta version.
Clarified tooltip of obtaining extra seeds.
Alveo Vera and Megafrond - adjust the gas absorption rate in proportion to the growth rate.
Mimika can pollinate non-yielding plants.
Sweetle, Grubgrub and Mimika being able to accelerate plants together at the same time.
Lumb can extract seeds.
Ovagro does not consume water when all its branches are fully grown and waiting to be harvested.
the Options require a restart and some patches are not applied if the options are disabled or the user does not own a DLC.

Compatibility with the new U55 beta version of the game.

improved compatibility with "Customize Plants" mod
when it allow decorative seeds to be planted in an ordinary Farm Tiles / Hydroponics

suppressed the "Food has decayed" notification when the "Exuberant" mutant plant was harvested.

Divergents are better at reaching plants growing down from the ceiling.
Pips can reach plants in Planter Box and Flower Pot when looking for seeds to extract.

de facto, no changes, just a misclick

Compatibility with the new U53 beta version of the game.
Divergents can reach decorative plants in flower pots.

fixed possible rare crash when Bonbon Tree branch was (un)wilted and trunk was destroyed at same game tick.

quick fix for U52-623230