applets/taskmanager: subscribe to windowViewAvailableChanged signal
Window View can become unavailable after compositing is disabled, so it's not a constant. BUG: 469731 FIXED-IN: 5.27.6
Window View can become unavailable after compositing is disabled, so it's not a constant. BUG: 469731 FIXED-IN: 5.27.6
mentioned in commit 1d94e6bd