Fix check_desktop variable timeouts

I forgot that tries was configurable. Sigh. Convert it to a
timeout argument.

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

lib/utils.pm

@@ -738,7 +738,11 @@ sub check_desktop {
     # icon. But GNOME has gone back to the top bar being a solid color
     # by default, so we don't have this problem any more and this is
     # back to just being a simple needle match.
-    assert_screen "apps_menu_button", 30;
+    my %args = (
+        timeout => 30,
+        @_
+    );
+    assert_screen "apps_menu_button", $args{timeout};
 }
 
 sub download_modularity_tests {

tests/_graphical_wait_login.pm

@@ -91,7 +91,7 @@ sub run {
     # Move the mouse somewhere it won't highlight the match areas
     mouse_set(300, 800);
     # KDE can take ages to start up
-    check_desktop(tries=>40);
+    check_desktop(timeout=>120);
 }
 
 sub test_flags {

tests/desktop_notifications.pm

@@ -67,7 +67,7 @@ sub run {
         type_very_safely get_var("USER_PASSWORD", "weakpassword");
         send_key 'ret';
     }
-    check_desktop(tries=>30);
+    check_desktop(timeout=>90);
     # now, WE WAIT. this is just an unconditional wait - rather than
     # breaking if we see an update notification appear - so we catch
     # things that crash a few minutes after startup, etc.