491100c7ee
Trust the heuristics in shell_app_can_open_new_window() to get it right more often than not, and add an appropriate check in activate(). This makes the behavior consistent with the dash, e.g. we will try to open a new window (and show the corresponding animation) for apps that don't have a "New window" item in their dash context menu. https://bugzilla.gnome.org/show_bug.cgi?id=736329