Draft: Edit text in place
Ticket #426 https://www.riscosopen.org/tracker/tickets/426
This requires also RiscOS/Sources/Lib/RISC_OSLib!29 (merged)
Ticket #426 https://www.riscosopen.org/tracker/tickets/426
This requires also RiscOS/Sources/Lib/RISC_OSLib!29 (merged)