Sentence-case screen titles for invite/QR scanner

src/Navigation.tsx

@@ -311,7 +311,7 @@ function commonScreens(Stack: typeof Flat, unreadCountLabel?: string) {
       <Stack.Screen
         name="InviteScanner"
         getComponent={() => InviteScannerScreen}
-        options={{title: title(msg`Scan QR Code`), requireAuth: true}}
+        options={{title: title(msg`Scan QR code`), requireAuth: true}}
       />
       <Stack.Screen
         name="SharedPreferencesTester"

src/features/inviteFriends/InviteScannerScreen.tsx

@@ -73,7 +73,7 @@ export function InviteScannerScreen() {
         <Layout.Header.Outer>
           <Layout.Header.BackButton />
           <Layout.Header.Content>
-            <Layout.Header.TitleText>{l`Scan QR Code`}</Layout.Header.TitleText>
+            <Layout.Header.TitleText>{l`Scan QR code`}</Layout.Header.TitleText>
           </Layout.Header.Content>
           <Layout.Header.Slot />
         </Layout.Header.Outer>

src/features/inviteFriends/InviteScannerScreen.web.tsx

@@ -20,7 +20,7 @@ export function InviteScannerScreen() {
       <Layout.Header.Outer>
         <Layout.Header.BackButton />
         <Layout.Header.Content>
-          <Layout.Header.TitleText>{l`Scan QR Code`}</Layout.Header.TitleText>
+          <Layout.Header.TitleText>{l`Scan QR code`}</Layout.Header.TitleText>
         </Layout.Header.Content>
         <Layout.Header.Slot />
       </Layout.Header.Outer>

src/screens/Settings/FindContactsSettings.tsx

@@ -78,7 +78,7 @@ export function FindContactsSettingsScreen({}: Props) {
         <Layout.Header.BackButton />
         <Layout.Header.Content>
           <Layout.Header.TitleText>
-            <Trans>Find and Invite Friends</Trans>
+            <Trans>Find and invite friends</Trans>
           </Layout.Header.TitleText>
         </Layout.Header.Content>
         <Layout.Header.Slot />