apps_startstop: tweak print theme editor launch to avoid #2165657

Typing a partial binary name no longer seems to work. Typing the
full binary name works, but differently from before; seems best
to do a partial entry name search so we launch the actual entry,
not the executable directly.

Signed-off-by: Adam Williamson <awilliam@redhat.com>

tests/apps_startstop/kde/cpteditor.pm

@@ -7,7 +7,7 @@ use utils;
 
 sub run {
     my $self = shift;
-    menu_launch_type 'printthemeeditor';
+    menu_launch_type 'print theme';
     # Check that it is started
     assert_screen 'cpteditor_runs', timeout => 60;
     # Close the application