Issue Description: hideNames/hidenames doesnt remove the playername from the face tile

• Dynmap Version: v3.2.1
• Server Version: paper-1.17.1-353.jar
• Pastebin of Configuration.txt: https://pastebin.com/WXr7Duhg
• Server Host (if applicable): self hosted
• Pastebin of crashlogs or other relevant logs: n/a
• Other Relevant Data/Screenshots: n/a
• Steps to Replicate: Start any server with dynmap running, and set hidenames: true. Open any modern web browser and on the player sidebar, then right click > inspect element on a players face. You can ctrl+f for the playername in the inspector tool, because playername.png is what the player face tiles are saved as. I know there is an option to hideplayerfaces too, but I feel like being able to find players by name whilst hidenames is true goes against the purpose of it

[x] I have looked at all other issues and this is not a duplicate
[x] I have been able to replicate this

Just to confirm - you are confirming that ticking the option doesn't rename the image that is displayed on screen? Or something else?

I have a feeling this is a stylistic choice rather than a security one. It might be possibly to obfuscate the image name (there might be proxies that do it).

Is this a specific security feature that you are looking for? Or just observation?

Changing this to be a feature request since this really isn't a bug

Listed in megathread #3461