Support rounding numbers from format

[andersnm]

Suggest a new NumberFormat.Round() method to return numeric inputs as numbers still, but with number formatting rules applied - i.e round to number of decimals, percent multiply, thousands division.

F.ex the number 0.02345 returns different values depending on the format:

Number format	Round(0.02345) output
0%	2
0.00000,	0.00002
0.00	0.02

This helps for cases when the user wants to insert the "visual part" of a value into a numeric database field.