Added widget minimize/restore button to frame, and app toolbar.

[FlushedCrusher]

This pull request implements a minimize and restore functionality to the webtop.

Existing OZP features were used to add a minimize button to widget toolbar.
Clicking the minimize button minimizes the widget. Clicking the widget icon in the desktop toolbar footer will restore the widget.

Similarly, clicking the widget icon in the desktop toolbar footer will act as a toggle for the minimized state of the widget.

[rpokorny]

Congratulations on submitting OZP's first community PR!

There are a few things that we will be requiring from all PRs:

1. Automated tests (if applicable). I notice that your code currently does not have any.
2. Documentation. In this case some screenshots with descriptions would be sufficient.
3. A description of manual test cases for exercising the feature.

We will discuss your PR at a review meeting next week.

[rpokorny]

If you want the review board to be able to attribute this contribution to you or your group, please email me identifying information such as your name, company/agency, and project. My email is ross dot pokorny at nextcentury dot com.

[FlushedCrusher]

Manual Test Cases

Test Minimize

• Launch WebTop
• Add a widget to the WebTop
• Click Minimize button in chrome of widget
• Expect widget to be minimized

Test Restore

• [Following Minimize Test]
• Click Widget icon in WebTop footer
• Expect Widget to be restored

Test Toggle

• [Following Restore Test]
• Click Widget icon in WebTop footer
• Expect widget to be minimized
• Click Widget icon in WebTop footer
• Expect Widget to be restored

[mparizernc]

@FlushedCrusher We plan to present this request for community testing at the end of the month to the GOSS Board. I wanted to reach out and see if you were willing to provide your name and/or group to the board for credit. If so please email me at mike.parizer@nextcentury.com. Otherwise we will leave the request as anonymous.