Make decimal input independent from the device locale

[emartynov]

Proposal - No mater user uses , or . as decimal separator just treat it as valid input.

Currently, the input value is checked with Number parsing and produces issues like #389.

[piotrek1543]

@emartynov is already it fixed? I think about forcing programmatically Locale to Locale.English where problem occurs (as you may remember, I had similar one during implementing tests).

[emartynov]

It is not fixed