Default slippage changes

[NikolaiYurchenko]

closes https://github.com/Fujicracy/fuji-v2/issues/473

Default slippage changed to 0.5% Added warning in confirmation modal if estimated slippage is bigger than selected

[github-actions[bot]]

Please test this PR on: https://v2-staging-476-dot-fuji-306908.ey.r.appspot.com

[ferostabio]

@NikolaiYurchenko just tried setting a slippage of 0,001 and I didn't get the warning in the confirmation modal

[ferostabio]

• [x] Change slippage in confirmation modal to Slippage... est ~x (max y)