The source project of this merge request has been removed.
taskmanager: Show highlight before ToolTipInstance starts loading for grouped tooltips
For grouped tooltips, if there are many windows in a group, it could take a long time before all ToolTipInstances are loaded.
Show highlight before ToolTipInstance starts loading to make user feel less unresponsive.
Note: Will not work when a tooltip is already visible (move directly from a task to a grouped task)