Flowers change, balance and polish

Flowers feature changes

• To make flowers use more relevant, the base price has been downed from 40 to 20
• Insect spawn is now a manual skill, letting players choose whether want challenge or not
• The flying insect "Sweety" is no more invoked by the Apetizer plant, but is now one of the possible insect called by the new active skil
• The Apetizer has changed to become the Necrophagia, its special is now a chance to convert dead ennemies around into biomass

Balance

• The increase rate of upgrades, in the garden, has been re-upped
• The special power of the Gobbler can't be upgrade no more than level 4, giving, at max upgrade, 40% chance to produce 5 biomass
• The Chewer no longer slows down its targets
• Slow down conditions can no longer stop ther targets. Only specials having this particular trait, like the rooter one, can really stop the Nibblers
• Upgrades refunded
• To let the player choose a mutation by use and not price, all mutations of the same tier cost the same price to buy and upgrade

Fix and add

• Add stats, in the garden upgrade menus: damage over time (called "conditions"), the number of conditions applied by each attack and the time it remains
• Fix a bug that made the biomass number wasn't updated when using it in pause
• Fix a bug that prevent the challenge menu to be properly shown and updated, on main map, when you unlock a new challenge level
• Add a new model modification, on the Nibblers spawn, which correspond to the challenge level