GitLab

(some are also available in other builds):

* New icon highlighting scheme - hue rotated 180°, photographic negative,
  darkened 25% - suits Ursula icons better.
* Release-button window tools compile-time switch turned on.
* Any "TASK" word cleared on exit from Wimp_OpenWindow, Wimp_GetWindowState,
  Wimp_ForceRedraw and Wimp_CloseDown.
* Child windows are no longer allowed to be opened inside the icon bar.
* Message_IconizeAt generation optimised, and no longer calls non-X SWIs.
* Message_IconsChanged implemented, and switched out on speed grounds.
* Wimp_ReadSysInfo 15 removed, replaced with (new) Wimp_Extend 11.
* Backwindows are now segregated from normal windows. A new category,
  foreground windows, are added, and stay above all other windows. (The error
  box template is updated to make it a foreground window.)
* ROM sprites override RAM sprites (and duplicate RAM sprites are deleted
  during the building of the sprite lookup list, preceding the first sprite
  plot after a sprite pool update).
* Wimp_ReadSysInfo 16 added, to return sprite area pointers in order of
  priority (Wimp_BaseOfSprites retains the ROM/RAM distinction).
* Error box code altered:
  + symbolic names used for offsets into tempworkspace
  + error button text buffer enlarged
  + stretched error buttons now shrink back for next use
  + int_flush_opens called at appropriate points to ensure buttons are seen to
    slab in, and to reduce flicker when redisplaying error box at a different
    width (also fixes some redraw bugs)
  + Cancel button given the R6 type border when it will be activated by Return
    (and is therefore moved to the extreme right in such cases)
  + Escape now always selects the second-right button (unless there's only one
    button!) - this also fixes a bug when there's a single user-defined button
  + keypresses in "xxx may have gone wrong" error boxes are now correctly
    interpreted - previously the buttons available in the underlying box were
    being used to determine the effect of keys
  + maximum number of buttons increased from 4 to 8, and the machine no longer
    crashes when the maximum is exceeded
  + window stretches horizontally to keep error message to 7 lines or less
* Bugfix: opening or creating a window with a minimum x visible area coordinate
  of -1 was leading to any of smearing/flickering/recursive drawing. (This was
  actually due to a failure to recognise which windows' positions had been
  updated.)
* Features merged in from spinner branch Wimp:
  + support for UpCall_MediaSearchEndMessage added
  + control-termination allowed in upcalls (used to require null-termination)
  + escape character switched to default during error box display, then
    switched back again afterwards
* GetRectangle filters are now called with (internal) window handle in R10.
* Autohourglass is deactivated whenever WrchV is invoked. (Also optimised.)
* Action button bugfixes:
  + action buttons now deselect if the pointer is dragged off and a window tool
    is the pressed before all the buttons have been released
  + action buttons now slab in following a long (autorepeating) press on a
    scroll arrow window tool