Revert back to inbox tab as path param

Inbox links were broken, and could not simply be fixed by editing the
links. The loadData function needs to know the tab as well, and
currently it doesn't have the information if the tab isn't in the path
params.

src/components/MobileMenu/MobileMenu.js

@@ -32,7 +32,7 @@ const MobileMenu = props => {
   }
 
   const inboxLink = (
-    <NamedLink name={currentUserHasListings ? 'InboxSalesPage' : 'InboxOrdersPage'}>
+    <NamedLink name="InboxPage" params={{ tab: currentUserHasListings ? 'sales' : 'orders' }}>
       <FormattedMessage id="MobileMenu.inboxLink" />
     </NamedLink>
   );

src/containers/OrderPage/OrderPage.js

@@ -28,7 +28,7 @@ export const OrderPageComponent = props => {
   if (isDataAvailable && !isOwnSale) {
     // eslint-disable-next-line no-console
     console.error('Tried to access an order that was not owned by the current user');
-    return <NamedRedirect name="InboxOrdersPage" />;
+    return <NamedRedirect name="InboxPage" params={{ tab: 'orders' }} />;
   }
 
   const detailsProps = {

src/containers/SalePage/SalePage.js

@@ -37,7 +37,7 @@ export const SalePageComponent = props => {
   if (isDataAvailable && !isOwnSale) {
     // eslint-disable-next-line no-console
     console.error('Tried to access a sale that was not owned by the current user');
-    return <NamedRedirect name="InboxSalesPage" />;
+    return <NamedRedirect name="InboxPage" params={{ tab: 'sales' }} />;
   }
 
   const detailsProps = {

src/routesConfiguration.js

@@ -158,22 +158,14 @@ const routesConfiguration = [
     auth: true,
     exact: true,
     name: 'InboxBasePage',
-    component: () => <NamedRedirect name="InboxSalesPage" />,
+    component: () => <NamedRedirect name="InboxPage" params={{ tab: 'sales' }} />,
   },
   {
-    path: '/inbox/sales',
+    path: '/inbox/:tab',
     auth: true,
     exact: true,
-    name: 'InboxSalesPage',
-    component: props => <InboxPage {...props} tab="sales" />,
-    loadData: (params, search) => InboxPage.loadData(params, search),
-  },
-  {
-    path: '/inbox/orders',
-    auth: true,
-    exact: true,
-    name: 'InboxOrdersPage',
-    component: props => <InboxPage {...props} tab="orders" />,
+    name: 'InboxPage',
+    component: props => <InboxPage {...props} />,
     loadData: (params, search) => InboxPage.loadData(params, search),
   },
   {