CORE-19061
Following PR #5571 (commit 2d53e953c), it became apparent that the
management of the status-bar when showing the menu hints could be
simplified further.
Use "simple-text" status-bar display mode when showing menu hints.
The original status-bar panes state is "remembered" and are automatically
restored when the "simple-text" mode is disabled.
It's necessary to make this clamping there so that returned values are
always used consistently in taskmgr, including in places where the
values are directly fetched into other functions.
This is a free adaptation from
Wine commit
a9742b3210c4cec67aca3c0012f3b9504a4368cf
From: Gerald Pfeifer <gerald@pfeifer.com>
taskmgr: Move out-of-domain checking into
PerfDataGetProcessorUsage() and PerfDataGetProcessorSystemUsage().