Connect ledger component

[x] Refactored @sdtsui 's code for the better
[x] Restyled ConnectLedger component to reflect latest UI changes
[x] Created ConnectLedgerFlow to be consistent with the structure created in ImportSeedFlow
[x] Connected ConnectLedgerFlow with ReactRouter
[x] Improved @chikeichan 's ImportSeed styling for consistency and to reflect latest UI changes
[x] Changed %btn-primary disabled to opacity: 0.25 to reflect latest UI changes
[x] Edited CreateNewAccount components to reflect latest copy and UI changes

kyokan / onoma-extension