applets/systray: don't clear old applet before transition
Instead, set opacity:0 and x:0 to avoid invisible applets, because during a transition the two properties will be changed by the animation.
Instead, set opacity:0 and x:0 to avoid invisible applets, because during a transition the two properties will be changed by the animation.
mentioned in commit 22e03887
·mentioned in commit 22e03887