Convert all remaining Modals to use Portal (UI consistency) (#4625)

* FirstRun dialog -> Portal

* CreateAccount Modal -> Portal

* CreateWallet dialog -> Portal

* Transfer dialog -> Portal

* Fix failing tests

* ShapeShift dialog -> Portal

* Verification dialog -> Portal

* EditMeta dialog -> Portal

* PasswordManager dialog -> Portal

* WalletSettings dialog -> Portal

* AddAddress dialog -> Portal

* s/delete address/forget address/

* AddContract dialog -> Portal

* DeployContract dialog -> Portal

* ExceuteContract dialog -> Portal

* LoadContract dialog -> Portal

* SaveContract dialog -> Portal

* UpgradeParity dialog -> Portal

* Convert inline modals (tsk, tsk)

* Remove ui/Modal

* Import dialog i18n

* Button array returns (thanks @derhuerst)

* Unneeded debug

* Typo

* Readability formatting