Improve compatibility with FlyingPress plugin

This isn’t critical or urgent, but there is a small compatibilty issue with the FlyingPress plugin. When accessing the plugin’s dashboard, looks like the plugin adds some styling to its elements and it affects uiXpress elements as well:

The styling of the admin menu is changed, there is a border on every menu item and the menu below has a smaller line spacing.

But as I said, this isn’t critical or urgent, the plugin works as intended and this styling issue only happens when viewing the FlyingPress dashboard and not anywhere else.