Calc function to check for text that could be number in order to place UI indicators

[Caolán McNamara]

On Wed, 2015-10-07 at 14:10 +0200, Eike Rathke wrote:
> Hi Łukasz,
> 
> On the LibreOffice Conference Hackfest at Aarhus we talked about 
> placing UI indicators in the current view to hint cells that contain 
> text that could be numbers instead.

That would be v. neat. If we had a UI indicator for errors/warnings
detected in the idle loop I imagine we could extend it with all sorts
of checks, like Andrzej's unit detection stuff and things like
"formulas inconsistent with neighbouring formulas" ?

C.