Fix invalid [$e] in displayconfig.desktop

Thanks to Francois Andriot for the patch
(cherry picked from commit 1f79e53103)

kcontrol/displayconfig/displayconfig.desktop

@@ -3,7 +3,7 @@ Categories=Qt;KDE;X-KDE-settings-system;
 Comment=Configure display
 Comment[en_US]=Configure display
 DocPath=kcontrol/displayconfig.html
-Exec[$e]=kcmshell displayconfig
+Exec=kcmshell displayconfig
 GenericName=
 GenericName[en_US]=
 Icon=background
@@ -12,7 +12,7 @@ MimeType=
 Name=Monitor & Display
 Name[en_US]=Monitor & Display
 NoDisplay=false
-Path[$e]=
+Path=
 StartupNotify=true
 Terminal=false
 TerminalOptions=