Fix right click selection behavior in project panel (#21707)

Closes #21605

Consider you have set of entries selected or even a single entry
selected, and you right click some other entry which is **not** part of
your selected set. This doesn't not clear existing entries selection
(which it should clear, as how file manager right-click logic works, see
more below).

This issue might lead unexpected operation like deletion applied on
those existing selected entries. This PR fixes it.

Release Notes:

- Fix right click selection behavior in project panel

crates/project_panel/src/project_panel.rs

@@ -3496,6 +3496,9 @@ impl ProjectPanel {
                             // Stop propagation to prevent the catch-all context menu for the project
                             // panel from being deployed.
                             cx.stop_propagation();
+                            if !this.marked_entries.contains(&selection) {
+                                this.marked_entries.clear();
+                            }
                             this.deploy_context_menu(event.position, entry_id, cx);
                         },
                     ))