Fixed inability to save a contact without a phone number
when contact lose the number after replace similar number and
visibility of the SAVE button when editing/creating a contact.
Unification of input style for phone number. Now every time when the user will provide
a phone number in gui the right function key (RF key) will be work as CLEAR.
This means that if any number is in the phone number field, the RF key will remove
the last character. Otherwise it'll work as typical BACK button.
This changes also provide ability to add * and # sign to number.
Fix of the improper asterisk button behavior
in new contact window - pressing the button
to change an input mode resulted in
'OPTIONS' label being displayed for the
left function button in navbar when the
asterisk button was held.
Fix of the issue that editing existing contact's
number by adding country prefix resulted in
PureOS crash due to application stack overflow.
Additionally moved misplaced changelog entry.
