Improve ux for low gas price set (#5862)

* Show user warning if they set gas price below safelow minimum, error if 0.

* Properly cache basic price estimate data.

* Default retry price to recommended price if original price was 0x0

* Use mock fetch in send-new-ui integration tests.

2 files changed, 4 insertions, 1 deletions

diff --git a/ui/app/components/gas-customization/gas-modal-page-container/tests/gas-modal-page-container-component.test.js b/ui/app/components/gas-customization/gas-modal-page-container/tests/gas-modal-page-container-component.test.js
index 2ba2fa9e7..f068c40d0 100644
--- a/ui/app/components/gas-customization/gas-modal-page-container/tests/gas-modal-page-container-component.test.js
+++ b/ui/app/components/gas-customization/gas-modal-page-container/tests/gas-modal-page-container-component.test.js
@@ -78,6 +78,7 @@ describe('GasModalPageContainer Component', function () {
       customGasPriceInHex={'mockCustomGasPriceInHex'}
       customGasLimitInHex={'mockCustomGasLimitInHex'}
       insufficientBalance={false}
+      disableSave={false}
     />, { context: { t: (str1, str2) => str2 ? str1 + str2 : str1 } })
   })
 
diff --git a/ui/app/components/gas-customization/gas-modal-page-container/tests/gas-modal-page-container-container.test.js b/ui/app/components/gas-customization/gas-modal-page-container/tests/gas-modal-page-container-container.test.js
index 512832866..077ec471d 100644
--- a/ui/app/components/gas-customization/gas-modal-page-container/tests/gas-modal-page-container-container.test.js
+++ b/ui/app/components/gas-customization/gas-modal-page-container/tests/gas-modal-page-container-container.test.js
@@ -75,6 +75,7 @@ describe('gas-modal-page-container container', () => {
         gas: {
           basicEstimates: {
             blockTime: 12,
+            safeLow: 2,
           },
           customData: {
             limit: 'aaaaaaaa',
@@ -107,9 +108,10 @@ describe('gas-modal-page-container container', () => {
         blockTime: 12,
         customModalGasLimitInHex: 'aaaaaaaa',
         customModalGasPriceInHex: 'ffffffff',
+        customPriceIsSafe: true,
         gasChartProps: {
           'currentPrice': 4.294967295,
-          estimatedTimes: ['31', '62', '93', '124'],
+          estimatedTimes: [31, 62, 93, 124],
           estimatedTimesMax: '31',
           gasPrices: [3, 4, 5, 6],
           gasPricesMax: 6,