[dev] [surf] patch - setprop

As it is now, if the user hits escape while entering a URI or search
term, we get an xprop warning. If the user enters a term with spaces,
only the first word is taken. The first patch
(surf-tip-setprop_fix.diff) fixes this by using dmenu in the same way
as dmenu_run, and adding quoting.

The second patch (surf-tip-setprop_file.diff), which is meant to be
applied on top of the first, adds another argument to SETPROP, so a
file can be passed in. In this manner you can load dmenu with your
bookmarks or maybe common search terms. It defaults to /dev/null so
the behavior is the same as before unless changed. I split this out
into a second patch because I see it as optional, as opposed to a fix.

Hope these help,
-emg