UI feedback and pollen changes

. Add feedbacks on interfaces for:

• Pollen quantity by second you earn on pollen bar

• Pollen quantity needed on hovering the pollen menu

• Stats added when leveling up a plant, on hovering the level up button

One thing that came, when playing on highest levels with the new flowers balance, is that pollen active skill was too powerful on level start and too weak at the end and it was too "spamming". I added some improvement and behavior changes to have a more growing power and cost that bring a skill that need to be used less frequently but with greatest effects: . Add an upgrade in the garden, for the Solariane, that upgrade all pollen power by 5% and increase pollen cost by 1, with 10 levels . The pollen skill cost increase by 1 for each flower and the pollen area ticks its attacks 1 time more for each flower