Create an entry for the value corresponding to the button key in resource bundle. For example, Back=Back.
Create another entry of the key suffixed with '_help_info' to show the tool tip on mouse over. For example, Back_help_info=Back. This value may be different from the button text.
# Externalized Buttons Text
Back=Back
Back_help_info=Back
Cancel=Cancel
Cancel_help_info=Cancel
