fix(numberFilter): format large numbers  correctly

format large number to correct form instead of NAN.00 currently.
in previous code when first time we add the exponent with fractionSize
(number.toString()+'e'+fractionsize)
 and then convert it to an integer using ,
+(number.toString()+'e'+fractionsize)
when the number is very large and number will be represented by using exponent. for example 12345868059685210000 will be represented by 1.234586805968521e+21. as getting string in exponent is not handles, we get the number as NAN.
Handle when the number is being represented in exponent form, by adjusting exponent of number with fraction size:

Closes #8674
we have our own linting and style checkers in angular, `grunt ci-checks` will run them for you. This isn't an outright violation, but we want to not separate declarations with commas. Use `var` instead and indent correctly. Minifiers will take out the `vars` for minfication anyways, so it doesn't make a difference really, but it is helpful