Run result through `number_format` to get thousand separators

[sorbits]

This makes it easier to read large numbers, e.g. 1,432,678,321.

Without additional arguments number_format will use commas for thousand separates, if you think this may confuse people who run macOS with a different locale setting then I suggest using a thin space (U+2009) as a workaround for (presumably) being unable to get the system’s configured thousand separator.

I was considering also running the suggestion through number_format, e.g. writing currency 50000 D will show 50000 DKK which I would like to see as 50,000 DKK, but that requires a bit of refactoring, as the suggestion is returned from a helper function and used both as title and what is inserted for auto-completion.

[cgjosephlee]

The decimal places are gone. And is it possible to imply inputing numbers with delimiters?

[sorbits]

I updated the commit to keep two decimals.

For input, I have not looked at that part of the source.