[applets/systemtray] Fix highlight when applet comes back from hidden
Highlight should work correctly if selected applet changes state and is moved to hidden area and then comes back to visble area.
BUG: 435687 FIXED-IN: 5.22.0
Highlight should work correctly if selected applet changes state and is moved to hidden area and then comes back to visble area.
BUG: 435687 FIXED-IN: 5.22.0