Changed networks tab to explicitly pass in false and fix implicit type casting

ui/components/app/edit-gas-display/edit-gas-display.component.js

@@ -217,8 +217,8 @@ export default function EditGasDisplay({
             hasGasErrors === false &&
             supportsEIP1559 && (
               <GasTiming
-                maxFeePerGas={maxFeePerGas}
-                maxPriorityFeePerGas={maxPriorityFeePerGas}
+                maxFeePerGas={maxFeePerGas.toString()}
+                maxPriorityFeePerGas={maxPriorityFeePerGas.toString()}
                 gasWarnings={gasWarnings}
               />
             )

ui/components/app/gas-details-item/gas-details-item.js

@@ -90,8 +90,8 @@ const GasDetailsItem = ({ userAcknowledgedGasMissing = false }) => {
       }
       subTitle={
         <GasTiming
-          maxPriorityFeePerGas={maxPriorityFeePerGas}
-          maxFeePerGas={maxFeePerGas}
+          maxPriorityFeePerGas={maxPriorityFeePerGas.toString()}
+          maxFeePerGas={maxFeePerGas.toString()}
         />
       }
     />

ui/pages/confirm-transaction-base/confirm-transaction-base.component.js

@@ -417,7 +417,7 @@ export default class ConfirmTransactionBase extends Component {
           <div className="custom-nonce-input">
             <TextField
               type="number"
-              min=0
+              min={0}
               placeholder={
                 typeof nextNonce === 'number' ? nextNonce.toString() : null
               }
@@ -546,10 +546,10 @@ export default class ConfirmTransactionBase extends Component {
                   maxPriorityFeePerGas={hexWEIToDecGWEI(
                     maxPriorityFeePerGas ||
                       txData.txParams.maxPriorityFeePerGas,
-                  )}
+                  ).toString()}
                   maxFeePerGas={hexWEIToDecGWEI(
                     maxFeePerGas || txData.txParams.maxFeePerGas,
-                  )}
+                  ).toString()}
                 />
               )}
             </>

ui/pages/settings/settings.component.js

@@ -342,6 +342,10 @@ class SettingsPage extends PureComponent {
           path={ADD_NETWORK_ROUTE}
           render={() => <NetworksTab addNewNetwork />}
         />
+        <Route
+          path={NETWORKS_ROUTE}
+          render={() => <NetworksTab addNewNetwork={false} />}
+        />
         <Route path={NETWORKS_ROUTE} component={NetworksTab} />
         <Route exact path={SECURITY_ROUTE} component={SecurityTab} />
         <Route exact path={EXPERIMENTAL_ROUTE} component={ExperimentalTab} />