Various improvement on the code

1. close menu on clcking menu item
2. provide correct translations on the menu item text

Change-Id: Icaf4aa111b8a4d7d4fde105c8150841f2613c08e
diff --git a/client/src/components/Header.tsx b/client/src/components/Header.tsx
index 64d4c12..4963309 100644
--- a/client/src/components/Header.tsx
+++ b/client/src/components/Header.tsx
@@ -15,6 +15,7 @@
  * License along with this program.  If not, see
  * <https://www.gnu.org/licenses/>.
  */
+
 import { Box, Button, Menu, MenuItem } from '@mui/material';
 import { MouseEvent, useState } from 'react';
 import { useTranslation } from 'react-i18next';
@@ -22,26 +23,34 @@
 
 import { useAuthContext } from '../contexts/AuthProvider';
 
+type NavigateURL = '/' | '/contacts' | '/settings-account' | '/settings-general';
+
 export default function Header() {
   const { t } = useTranslation();
   const { logout } = useAuthContext();
 
   const navigate = useNavigate();
-  const [anchorEl, setAnchorEl] = useState<HTMLButtonElement | null>(null);
-  const handleClick = (event: MouseEvent<HTMLButtonElement>) => setAnchorEl(event.currentTarget);
-  const handleClose = () => setAnchorEl(null);
 
-  const goToContacts = () => navigate(`/contacts`);
+  const [anchorEl, setAnchorEl] = useState<HTMLButtonElement | null>(null);
+
+  const handleClick = (event: MouseEvent<HTMLButtonElement>) => setAnchorEl(event.currentTarget);
+  const closeMenuAndNavigate = (navigateUrl?: NavigateURL) => {
+    setAnchorEl(null);
+    if (navigateUrl) {
+      navigate(navigateUrl);
+    }
+  };
 
   return (
     <Box>
       <Button aria-controls="simple-menu" aria-haspopup="true" onClick={handleClick}>
         {t('Menu')}
       </Button>
-      <Menu id="simple-menu" anchorEl={anchorEl} open={Boolean(anchorEl)} onClose={handleClose}>
-        <MenuItem onClick={goToContacts}>Contacts</MenuItem>
-        <MenuItem onClick={() => navigate('/settings-account')}>{t('settings_account')}</MenuItem>
-        <MenuItem onClick={() => navigate('/settings-general')}>{t('settings_general')}</MenuItem>
+      <Menu id="simple-menu" anchorEl={anchorEl} open={Boolean(anchorEl)} onClose={() => closeMenuAndNavigate()}>
+        <MenuItem onClick={() => closeMenuAndNavigate(`/`)}>{t('conversations')}</MenuItem>
+        <MenuItem onClick={() => closeMenuAndNavigate(`/contacts`)}>{t('settings_menu_item_contacts')}</MenuItem>
+        <MenuItem onClick={() => closeMenuAndNavigate('/settings-account')}>{t('settings_menu_item_account')}</MenuItem>
+        <MenuItem onClick={() => closeMenuAndNavigate('/settings-general')}>{t('settings_menu_item_general')}</MenuItem>
         <MenuItem onClick={logout}>{t('logout')}</MenuItem>
       </Menu>
     </Box>