JBIDE-17912 Ionic palette: New Tabs wizard

New Tabs wizard is implemented. Test is added.
JBIDE-17728 Added angularjs features to nightly update site
JBIDE-17849 CSS Hyperlinks aren't working on non-WTP projects

CSS Files path resolution is fixed, CSS Hyperlink, Create New File Hyperlink are fixed
JUnit test is added in order to test CSS Stylesheets inclusion using absolute and relative URLs

Signed-off-by: vrubezhny <vrubezhny@exadel.com>