win32 NSIS installer: uninstall servatrice*

just avoid deleting servatrice.ini, if the user manually made one from
the servatrice.ini.example

cmake/NSIS.template.in

@@ -75,12 +75,16 @@ Section Uninstall
 	Delete "$INSTDIR\uninstall.exe"
 	Delete "$INSTDIR\cockatrice.exe"
 	Delete "$INSTDIR\oracle.exe"
+	Delete "$INSTDIR\servatrice.exe"
 	Delete "$INSTDIR\Usermanual.pdf"
 	Delete "$INSTDIR\libprotobuf.lib"
 	Delete "$INSTDIR\Qt*.dll"
 	Delete "$INSTDIR\icu*.dll"
 	Delete "$INSTDIR\qt.conf"
 	Delete "$INSTDIR\qdebug.txt"
+	Delete "$INSTDIR\server.log"
+	Delete "$INSTDIR\servatrice.sql"
+	Delete "$INSTDIR\servatrice.ini.example"
 	RMDir "$INSTDIR"
 
 	RMDir "$SMPROGRAMS\Cockatrice"