Make command move [direction] work with criteria

A container selected with criteria should be moved with the `move
[direction]` command, instead of this command always acting on the
focused container.

testcases/t/232-cmd-move-criteria.t

@@ -0,0 +1,37 @@
+#!perl
+# vim:ts=4:sw=4:expandtab
+#
+# Please read the following documents before working on tests:
+# • http://build.i3wm.org/docs/testsuite.html
+#   (or docs/testsuite)
+#
+# • http://build.i3wm.org/docs/lib-i3test.html
+#   (alternatively: perldoc ./testcases/lib/i3test.pm)
+#
+# • http://build.i3wm.org/docs/ipc.html
+#   (or docs/ipc)
+#
+# • http://onyxneon.com/books/modern_perl/modern_perl_a4.pdf
+#   (unless you are already familiar with Perl)
+#
+# Test that the `move [direction]` command works with criteria
+# Bug still in: 4.8-16-g6888a1f
+use i3test;
+
+my $ws = fresh_workspace;
+
+my $win1 = open_window;
+my $win2 = open_window;
+my $win3 = open_window;
+
+# move win1 from the left to the right
+cmd '[id="' . $win1->{id} . '"] move right';
+
+# now they should be switched, with win2 still being focused
+my $ws_con = get_ws($ws);
+
+# win2 should be on the left
+is($ws_con->{nodes}[0]->{window}, $win2->{id}, 'the `move [direction]` command should work with criteria');
+is($x->input_focus, $win3->{id}, 'it should not disturb focus');
+
+done_testing;