Decimal places option don't work correctly

Hi,

If you put for example 15.30 to the input which should have only 2 decimal places you cant put any more digits to it anymore. But if you put cursor in the middle and erase 5 so you have 1.30 you then cant add 5 after 1 as will which should be possible. Also selecting whole number in input (cmd+a) and start typing doesn't erase whats already in the input as well.
