awful.tag: filter out window before switching screens (FS#633)

Signed-off-by: Julien Danjou <julien@danjou.info>

lib/awful/tag.lua.in

@@ -346,7 +346,13 @@ end
 
 -- Register standards signals
 capi.client.add_signal("manage", function(c, startup)
-    if not startup then
+    -- If we are not managing this application at startup,
+    -- move it to the screen where the mouse is.
+    -- We only do it for "normal" windows (i.e. no dock, etc).
+    if not startup
+        and c.type ~= "desktop"
+        and c.type ~= "dock"
+        and c.type ~= "splash" then
         if c.transient_for then
             c.screen = c.transient_for.screen
             if not c.sticky then