Arjen Hiemstra authored Oct 16, 2020 and Nate Graham committed Oct 16, 2020

When an application that exposes media controls is pinned to the
taskbar, on a different desktop and the task manager is configured to
"only show tasks from the current desktop", hovering over the entry in
the taskbar will show a cramped and broken tooltip with media controls
overlapping the media title. While this is ugly, it has the additional
effect that all other tooltips end up broken until the tooltip is
reloaded by hovering a grouped entry.

To fix this, the media controls follow the header's maximum width rather
than the width, the two scrolling texts are given a proper implicitWidth
and the media controls are updated to match the header's margins and
spacing.

(cherry picked from commit a2481a94)