Add global shortcut to launch kcalc

Adding the 'Launch (1)' shortcut key which Qt5 maps to XF86Calculator

BUG: 353596

CMakeLists.txt

@@ -159,6 +159,10 @@ install( PROGRAMS org.kde.kcalc.desktop  DESTINATION ${KDE_INSTALL_APPDIR})
 install( FILES org.kde.kcalc.appdata.xml   DESTINATION ${KDE_INSTALL_METAINFODIR})
 install( FILES kcalc.kcfg  DESTINATION ${KDE_INSTALL_KCFGDIR})
 install( FILES kcalcrc.upd  DESTINATION ${KDE_INSTALL_DATADIR}/kconf_update)
+install( DIRECTORY DESTINATION "${KDE_INSTALL_FULL_DATAROOTDIR}/kglobalaccel" )
+install(
+    CODE "execute_process(COMMAND \"${CMAKE_COMMAND}\" -E create_symlink \"${KDE_INSTALL_FULL_APPDIR}/org.kde.kcalc.desktop\" \"\$ENV{DESTDIR}${KDE_INSTALL_FULL_DATAROOTDIR}/kglobalaccel/org.kde.kcalc.desktop\")"
+)
 
 ki18n_install(po)
 if (KF5DocTools_FOUND)

org.kde.kcalc.desktop

@@ -193,3 +193,6 @@ Type=Application
 StartupNotify=true
 Categories=Qt;KDE;Utility;Calculator;X-KDE-Utilities-Desktop;
 X-DBUS-ServiceName=org.kde.kcalc.desktop
+# Qt5 maps the Calculator key to Key_Launch1, that may change with Qt6 (QBUG-25261)
+X-KDE-Shortcuts=Launch (1)
+