Use Qt standard buttons. Only use "Make It So!" on Options page.

[rdswift]

Summary

• This is a…
  • Bug fix
  • Feature addition
  • Refactoring
  • Minor / simple change (like a typo)
  • Other
• Describe this change in 1-2 sentences:

Problem

There was inconsistent use of Qt standard buttons and Picard version of standard buttons, and "Make It So!" was being used in multiple places when the original intent was to use it on the Options page only.

• JIRA ticket (optional): PICARD-XXX

Solution

Remove the Picard standard buttons class and use Qt.QButtonBox.StandardButton definitions throughout. Replace additional use of "Make It So!" buttons with standard "Ok" button.

Action

Additional actions required:

• Update Picard documentation (please include a reference to this PR)
• Other (please specify below)

[phw]

I think that's a good move, thanks for this change

[zas]

LGTM