- Added FTransformGizmoDataBinder which allows for gizmos to be bound to vectors such that the vectors are updated when the gizmo changes, and the gizmo is updated from vectors when asked. This should make it easy-ish to create displays of gizmos.
- Used the data binder in STransformGizmoNumericalUIOverlay, an overlay containing a draggable numerical UI panel for gizmos. Note that currently all changes, including typing, intentionally go down a gizmo drag path, meaning that they trigger the begin/end transform edit sequence calls, to make the tools treat them as a gizmo drag (in part because some tools might otherwise assume that a gizmo update is from an undo transaction or some other path that is special-cased).
- Added some slate things to ModelingEditorUI to support the numerical UI, in particular a viewport draggable box, and a widget that emits a tick delegate.
- Added some delegates to gizmo context object and combined transform gizmos to allow things to bind/unbind to/from them appropriately.
#rb Ryan.Schmidt
#preflight 63ce97ebf2318350a2f3a6c4
[CL 23815889 by semion piskarev in ue5-main branch]
