#881 Colorize revised cells dynamically according to a time table

[sbougnoux]

I am getting confused with the mode "tools/draw revision in yellow". It seems a little bugged.
When toggle on, new cells turn yellow, but after a while not anymore...

Could we have a mode linked with the time table?
I am thinking of a mode that turns all cells modified after a specified time yellow, or even between a time interval. Therefore it would be easy to see how the tree was build, and more important what another user added recently. As the cells have this time tag it seems quite feasible.
Thanks for this great software anyway.