GREG-264: Remember gender when clicking back in wizard

The gender selection is not remembered when going back in the wizard. This only affects UiB, since the gender field is not shown for UiO.

frontend/src/routes/guest/register/steps/register.test.tsx

@@ -32,6 +32,13 @@ function getEmptyGuestData(): GuestInviteInformation {
   }
 }
 
+const allFeaturesOn = {
+  displayContactAtUnit: true,
+  displayComment: true,
+  displayContactAtUnitGuestInput: true,
+  showGenderFieldForGuest: true,
+}
+
 test('Guest register page showing passport field on manual registration', async () => {
   const nextHandler = (registerData: GuestRegisterData) => {
     console.log(`Entered data: ${registerData}`)
@@ -185,13 +192,6 @@ test('Gender required to be set if gender field is showing', async () => {
     console.log(`Entered data: ${registerData}`)
   }
 
-  const allFeaturesOn = {
-    displayContactAtUnit: true,
-    displayComment: true,
-    displayContactAtUnitGuestInput: true,
-    showGenderFieldForGuest: true,
-  }
-
   const formData: GuestRegisterData = {
     firstName: 'Test',
     lastName: 'Test2',
@@ -295,13 +295,6 @@ test('Gender not required to be set if gender field is not showing', async () =>
 test('Guest not allowed to proceed in wizard if phone number is not valid', async () => {
   const nextHandler = jest.fn()
 
-  const allFeaturesOn = {
-    displayContactAtUnit: true,
-    displayComment: true,
-    displayContactAtUnitGuestInput: true,
-    showGenderFieldForGuest: true,
-  }
-
   const formData: GuestRegisterData = {
     firstName: 'Test',
     lastName: 'Test2',
@@ -346,13 +339,6 @@ test('Guest not allowed to proceed in wizard if phone number is not valid', asyn
 test('Guest allowed to proceed in wizard if data is valid', async () => {
   const nextHandler = jest.fn()
 
-  const allFeaturesOn = {
-    displayContactAtUnit: true,
-    displayComment: true,
-    displayContactAtUnitGuestInput: true,
-    showGenderFieldForGuest: true,
-  }
-
   const formData: GuestRegisterData = {
     firstName: 'Test',
     lastName: 'Test2',
@@ -402,13 +388,6 @@ test('Default country code gets set in form values', async () => {
 
   }
 
-  const allFeaturesOn = {
-    displayContactAtUnit: true,
-    displayComment: true,
-    displayContactAtUnitGuestInput: true,
-    showGenderFieldForGuest: true,
-  }
-
   // Leave the mobile phone country code blank, it should
   // be populated with a default value
   const formData: GuestRegisterData = {
@@ -464,15 +443,6 @@ test('Foreign country code gets set in form values', async () => {
   }
 
 
-  // +393892778451
-
-  const allFeaturesOn = {
-    displayContactAtUnit: true,
-    displayComment: true,
-    displayContactAtUnitGuestInput: true,
-    showGenderFieldForGuest: true,
-  }
-
   const formData: GuestRegisterData = {
     firstName: 'Test',
     lastName: 'Test2',