GitLab

Re-opening a menu structure containing a dialogue box (especially one
containing the caret) was causing data aborts under some OSes/builds.

The minimum title bar length is now the same for windows without line borders,
even if the vertical scroll bar is also absent. This prevents cases when the
title bar shrunk so far that a graphics clipping error occurred.

Wimp_DragBox was looking in R0 for its flags, rather than R3, as specified!

If the pointer was to the right of the central zone, vertical autoscrolling
was working too slowly.

On Service_SwitchingOutputToSprite, the Wimp now re-assesses its idea of the
screen limits. This prevents Wimp_PlotIcon plots outside the current screen
bounds from being optimised out.