Cursor moves to the one before last position if select mask character and enter new values

[vvnc]

Bug Steps to reproduce:

1. Go to the official demo page: https://htmlpreview.github.io/?https://github.com/angular-ui/ui-mask/master/demo/index.html
2. Select some mask e.g. (999) 999-9999
3. Enter any characters in the "Masked input" field
4. Put the cursor at the end
5. Select characters including any mask character, e.g. - or )
6. Enter any characters

Result: cursor is on the one before last position

Expected behaviour: cursor is on the last position

Demo: