Add a file deletion mode without synchronization

### Description

I'm developing web applications PHP.
Netbeans is connected via FTP, but only the template folders and 1 site module are uploaded via FTP. The site has a lot of frameworks, a lot of modules and a lot of templates.
to work, I need to synchronize only 1 template and only 1 module.

I often upload a new module and a new framework via FTP. But after a while, I need to delete it locally so that these files and folders remain on the remote server.
By deleting them locally, these files and folders are deleted on the server because synchronization is enabled.
We need to have the function to delete files only locally, without the synchronization function.
For example, by pressing SHIFT + DEL so that the deletion is done without synchronization.

### Are you willing to submit a pull request?

No

The issue names no files or tests. Start by tracing NetBeans' FTP synchronization and local file-deletion handling, then check how keyboard deletion actions are registered. Done means providing a way to delete files locally while leaving their remote copies untouched, without changing synchronized deletion.

Written by the indexing model from the issue text.