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

- New Header Bar
- New Footer Bar (JBIDE-17874)
- New Content component
- New Scroll component (JBIDE-17850)
- Ionic palette items should be available as templates in HTML code assist (JBIDE-17852)
- Mobile palette is now available for angularJS template files (JBIDE-17888)
JQueryCategoryFilter.CATEGORY_JQM="jQuery"
JQueryConstants.JQM_CATEGORY="jQuery Mobile"
The first name is not nice, I admit. It could be better JQueryCategoryFilter.JQ_CATEGORY