feat: add option to show real filenames

[EdCordata]

This pull request adds an option to allow Nemo to display real filenames - a feature I’ve personally wanted for a long time, and one that others have requested as well:

• Nemo option to show REAL filename for .desktop files #2456
• https://forums.linuxmint.com/viewtopic.php?t=224160
• Maybe even this: Nemo hides filename for .desktop files with execute permission #1404

This also solves issue of having multiple files appear with the same name, in some cases, and other issues.

The feature is optional and disabled by default, so it won’t affect existing users. It can be enabled with:

gsettings set org.nemo.preferences show-real-filename true

[mmseng]

Please, please implement this. A file manager that is unable to display (nor allow editing of) a file's name is a joke.

[leigh123linux]

Please, please implement this. A file manager that is unable to display (nor allow editing of) a file's name is a joke.

Sorry we are too busy reading spammy comments like yours, maybe if there were less it would leave us more time to do code reviews and merges!!

[mmseng]

I apologize for my rude and ungrateful comment. It was made in frustration. I also recognize a need to adjust my expectations. And sorry for spamming the thread (again).