2 New features added and 1 issue fixed

Fixed the following issue: when using the up and down arrow to scroll the countries list, the entire page is also scrolled.
To solve it I added some code to make the country list gain the focus when clicking on the flag.

Added the ability to disable the separation of the dialing code using a white space dirven by the split mode (TRUE/false) parameter.

Erase the content of the field when it looses focus if only the dialing code is present. Recover it when it gains the focus. This avoids forcing the user to remove the value if he doesn't want to send it.