Cw 314 trocador receive screen update (#823)

* Change receive screen ui

* Upgrade flutter packages

* revert Upgrade flutter packages

* revert Upgrade flutter packages

* Adjust flow for anon invoice page navigation

* Add receive screen ui

* Implement anonpay invoice

* Add invoice detail to transactions page

* Implement donation link

* Fix transaction filter and details view

* Save donation link

* Fix transaction display issues

* Fix formatting

* Fix merge conflict

* Fix localization

* Fix transaction amount display

* Fix transaction limit for fiat

* Update fix from code review

* Fix issues from code review

* Make amountTo nullable to avoid potential

* Remove encoding for description in donation link

* Remove optional params from request

* Fix QR image version

* Refactor QRCode, fix issues from code review

* Pass version to QRCode full page

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Co-authored-by: OmarHatem <omarh.ismail1@gmail.com>

tool/utils/secret_key.dart

@@ -27,6 +27,7 @@ class SecretKey {
     SecretKey('trocadorApiKey', () => ''),
     SecretKey('trocadorExchangeMarkup', () => ''),
     SecretKey('twitterBearerToken', () => ''),
+    SecretKey('anonPayReferralCode', () => '')
   ];
 
   final String name;