Removed constant and replaced it with a provider

[xeinherjar]

This will allow users to set defaults in the run block.

This will accept the locale formatting if passed in for each date picker without overwriting the locale formatting for ALL date pickers. This allows you to have multiple date pickers with their own date formats.

[vincevargadev]

I was about to implement this! :+1: Definitely prefer a provider over the original constant implementation.