SUMMARY
"Icon" parameter which is set in [Desktop Entry] section of the ServiceMenu desktop file is ignored.

STEPS TO REPRODUCE
An example of ServiceMenu with submenu:
------------------------------
[Desktop Entry]
Type=Service
ServiceTypes=KonqPopupMenu/Plugin
MimeType=all/all;
Actions=Create;Check;
Icon=document-encrypted
X-KDE-Submenu=md5 sums
X-KDE-Priority=TopLevel

[Desktop Action Create]
Name=Create md5 sums
Icon=document-new-from-template
Exec=dolphin-md5-create.sh %F

[Desktop Action Check]
Name=Check md5 sums
Icon=dialog-ok-apply
Exec=dolphin-md5-check.sh %f
------------------------------

OBSERVED RESULT
Icon for the top-level entry in the menu is taken from its submenu. In the case of aforementioned desktop file the icon which is shown is "document-new-from-template.svg".

EXPECTED RESULT
Icon for the top-level entry should be "document-encrypted.svg".

SOFTWARE/OS VERSIONS
OS Version: Kubuntu 22.04
KDE Plasma Version: 5.24.4
KDE Frameworks Version: 5.92.0
Qt Version: 5.15.3