[Folder View] make file context menu consistent with Dolphin's

Summary:
BUG: 401652
FIXED-IN: 5.15.0

Test Plan:
Before: {F6464047}

After: {F6460232}

It matches Dolphin: {F6460009}

Reviewers: #plasma, hein, #vdg, ndavis

Reviewed By: #plasma, hein, #vdg, ndavis

Subscribers: ndavis, mart, janpr, plasma-devel

Tags: #plasma

Differential Revision: https://phabricator.kde.org/D17393