Dfhack.init example fixes

The keybindings for script `gui/rename` were active in invalid contexts (all of them), including the default view with no cursor.  I added constrained keybindings for `LookAround` and `ViewUnits` (`k`,`v`).  

There were two pairs of keybindings for Workflow.  I moved these to adjacent lines and further constrained one.  I think that one pair should be deleted, but didn't want to unilaterally decide which pair to keep.  The `Alt-W` bindings are probably better-known.