Added tag /*NXLT*/ for DynamoCoreWpf string

@ke-yu I added tag /*NXLT*/ for string in DynamoCoreWpf and put some strings there to resx file
This is a *UI* dialog, so the message box title needs to be localized, in this case, it is string ''Install Dynamo''. Besides, why not combine that two string together? I mean, instead of "... clock ok to close {0} ...", why not ''... click ok to close Dynamo and ..." ?