Pinned debugger tooltips do not move with extra editor windows

• open project, set breakpoint, start debugging
• open an extra editor window with the document with the breakpoint (Split > Open in New Window)
• pin a debugger tool tip
• move the extra editor window around

Expected: the tool tip moves with it
Actual: the tool tip stays where it is on the screen

It works correctly with tool tips while in the main editor window.

(DebuggerToolTipManagerPrivate::eventFilter handles movement of the main editor window, but not of extra windows.)