Toolbar visibility and Bug fixes

Widget changes:
- Added options for showing part of the toolbar buttons visibility
- Bug fix icon unlink (was cut)
- Added use min max height to support auto grow
- Added option to show toolbar only on focus.
- Bug fix Font menu did not close after selecting font name

Others changes:
- Add ignore list for files that are created by the modeler when running
the test project
- Added widget.xsd for to enable hinting in the widget.xml
- updated test project
- updated widget version number