App: slippage check + various tweaks & fixes

[bpierre]

• Add a slippage check on the Leverage screen.
• Improve max button rules (Borrow, Leverage, update position).
• InputField can now display a drawer (loading / error / success).
• Account screen: only show tap buttons if the account is connected.
• InputField: add an error drawer .
• UI tweaks to prevent layout issues with huge input values.
• Earn pools list: update transition.
• Theme: add brand:lightBlue.
• StakePosition summary card: only use positive color with non-zero rewards.
• LoanCard: move delegate badge next to the new interest rate.
• Screen: improve appear transition.
• Memoize several components to improve rendering performances: Field, InterestRateField, RedemptionInfo, Slider.
• fmtnum(): round up if non-zero rounded value appears as zero (e.g. 0.00 => 0.01).
• Subgraph hooks: make sure addresses used to query are lowercase.
• useCollIndexFromSymbol() => getCollIndexFromSymbol().
• Coding style updates / linting fixes.