Tooltip on item at right edge of window is cut off

As stated. If a tooltip is created on an item that is, for example, on the right side of a window, the text is drawn from the mouse contact point... and is therefore (mostly) invisible since it draws off the side of the window.

I would like the behavior (perhaps optionally) to be that if the text would fall off the edge, the bounds of the tooltip are adjusted so the entire tip is in the window.

No file or test is named in the issue. Start by locating the tooltip creation and rendering entry points, then reproduce the case with an item at the window's right edge. Done means the complete tooltip remains visible within the window without changing its normal placement unnecessarily.

Written by the indexing model from the issue text.