Show hostname in Navigation panel mouse-over when description is empty

In the Navigation panel, when hovering over an entry, RDM currently displays the entry description. When the description is empty, it displays the entry name itself. However, the entry name is already visible in the Navigation panel, so displaying it again in the mouse-over provides no additional information.

I think it would be more useful to display the hostname as a fallback when no description is configured. This would be particularly helpful when the hostname of an entry is changed frequently, as it would allow users to quickly verify which machine they are about to connect to without having to open the entry properties.

The current behavior of displaying the description when it is configured can remain unchanged; the hostname would simply be displayed when the description is empty.

thanks!