Two cosmetic changes for the X11 version of the getlin() routine:
1) Make the text entry box big enough to hold 60 characters before
sliding the beginning input off the left edge, instead of just 13,
so that user can see much more of what is being typed;
2) Make the cancel button be a little wider, and the okay button be
the same width as the cancel button so they look a little nicer.
2bf652dd0f