Remove phone number input mask

[emxsys]

To support a variety of international phone numbers, make the phone number input validation mask configurable. Include support for no validation.

[emxsys]

Consider simply removing the input validation mask.

[emxsys]

Removed the phone number input validation mask to accommodate various number formats. Numbers are stripped of non-alphanumeric chars before being stored in the database. Alpha chars are now allows. (I'm aware of two alpha strings used in the USA: "P" and "O" for "private" and "outside area" respectively).

• Now using a common method to strip phone numbers of non-alphanumeric chars.
• Removed input pattern mask from the Add Permitted Number and Add Blocked Number dialogs.
• Displaying the configurable phone number format string in the dialogs for guidance only.