Allow to set global default layout This is usefull when VDB is opened from Smalltalk UI many times (such as when playing with ArchC or Powerlang)

UI: add theme support to instruction list

UX: remember last working (range) expression in disassembly view

UI: autogically select contrasting foreground in lists If application does not specify foreground color for an item but does specify background color, try to be helpful and choose either white or black foreground, whichever is more contrasting on given background. This helps especially with dark themes.

UI: always use `GDBRegisterWithValue >> #valueString` in register presenter ...since `#valueString` returns the value GDB wants to display to user.

UX: do not update window's contents when window is too small Consider application's window as NOT visible if either width or height is very small (5 pixels and less). This helps to prevent useless updates when window is in resizing panel and splitter is moved to the edge. In that case, window is not practically visible, but technically it is still `#shown` and has `#width` or `#height` of 1 pixel.

UI: properly initialize message view background using list view's `#viewBackground` (and not `#background`, which is not a configured value but rather part of graphics context state)

UX: oops, do not use recursiveDetect: on thread / stack tree ...since it forces tree nodes to (unnecesarily) fetch frames and thus slowing down thread switching!

UI: display breakpoints in instruction list

Overrided `displayOn:aGC ...` instead of `displayLabelOn:aGC ...` The effect is the same and it's more logical to override this one.