PIECEWISE editing improvement suggestion

[Alberto Candel]

One can define a piecewise function with the command PIECEWISE(cond1,expr1,cond2,expr2...)
(BTW, is there a limit to the number of cond and expr?). Once entered, this transforms into the usual math notation
{exp if cond ...

If a piecewise function is entered in the function app, and later that definition needs to be updated, say by adding a new condition, the editor does not allow that. It would be nice to be able to do so as one does with matrices.

Also, the math template key provides a menu where one finds the template for piecewise at the (2,5) entry, but it offers only two conditions. Could that be made to work like the matrix template that allows for adding rows (and columns)?