JBIDE-17728 HTML5 Palette: Ionic components. Created new feature,plugin,...

...test.

New Header Bar

JBIDE-17850 Ionic palette: New Scroll wizard

New Scroll wizard is implemented.
New Content wizard is implemented.
Tests are added.

JBIDE-17852 Ionic palette items should be available as templates in HTML code assist

JBIDE-17874 New Footer wizard

New Footer wizard is implemented. Test is added.