Fix the display of the popup to restart Drive at every startup

Steps to reproduce:

1. Start Nuxeo Drive 5.2.9
2. Configure Drive with a Nuxeo instance
3. Modify $NUXEO/templates/drive/nxserver/config/nuxeo-drive-config.json to configure some features, for example with this content

   {
     "client-version": "5.2.9",
     "delay": 30,
     "ignored_prefixes": [".", "icon\r", "thumbs.db", "desktop.ini", "~$"],
     "ignored_suffixes": [".bak", ".crdownload", ".dwl", ".dwl2", ".lnk", ".lock", ".nxpart", ".part", ".partial", ".swp", ".tmp", "~"],
     "ignored_files": ["^atmp\\d+$"],
     "log_level_file": "DEBUG",
     "timeout": 30,
     "handshake_timeout": 60,
     "beta_channel": false,
     "update_check_delay": 3600,
     "ui": "web",
     "synchronization-enabled": false,
     "feature": {
       "auto-update"     : true,
       "direct-edit"     : true,
       "direct-transfer" : false,
       "synchronization" : false,
       "s3"              : false
     }
   }
   

4. Restart Nuxeo to take into account this change
5. Restart Drive : a popup is displayed with this content: "You need to restart Nuxeo Drive to continue using it."
6. Go to Settings > Features and observe that the settings from the server are not taken into account. It's normal because a restart is required
7. Restart Drive : a popup is displayed with this content: "You need to restart Nuxeo Drive to continue using it."
8. Go to Settings > Features and observe that the settings from the server are now taken into account ==> the popup which asks to restart should not be displayed now : this is the bug which must be fixed.