change: add option to display 1.0M as 1000K

[S0yKaf]

This is a change to implement #56

I cleaned up the code a bit in the truncateText function.
I also changed the behavior of truncateLetter to be the toggle for the Million display as 1.0M versus 1000K.

in short:

• Truncate Letter -> 1.0M
• Truncate Letter -> 1000K

[nanjuekaien1]

@S0yKaf
Why cleaned up L[‘Truncate Letter East Asia’] support for East Asia?

[S0yKaf]

@S0yKaf
Why cleaned up L[‘Truncate Letter East Asia’] support for East Asia?

I just cleaned up the code to be more readable and less redundant. I did not change the functionality.

If the functionality did change, It wasn't my intention. so please let me know if that's the case.

[nanjuekaien1]

@S0yKaf
L['Truncate Letter East Asia'] It was added for the localisation of East Asia, which translates to ‘M’ = ‘万’.

[S0yKaf]

@nanjuekaien1 I understand what I did wrong now. I fixed it