reset v3 mint state on migrate mount/unmount

- bring back gradient background
- improve header
- improve light mode

* multiple bug fixes

* remove unused local

* disable currency select on bottom liquidity

link to owner

* Start styles

* Add liquidity styles & consistency

* clean up styles

* remove un-used element

* New styles

* fix errors

closes #47

* mobile styles

* remove unused local

* update react imports

* fix imports
Co-authored-by: Callil Capuozzo <callil.capuozzo@gmail.com>

show currency values and price impact in the confirmation modal (fixes https://github.com/Uniswap/v3-interface/issues/92)