JBIDE-16919 Visual Preview: Adding navigation from view to source support. Refactoring
JBIDE-16919 Visual Preview: Adding copyright and @author info + //$NON-NLS-1$
JBIDE-16919 Visual Preview: Disabling all links
JBIDE-16920 Visual Preview: create refresh options

- refresh on change
- refresh on save
- adding suitable icons
- changing view name to the "HTML Preview"
JBIDE-17083 Visual Preview: Improving navigation from source to view part
JBIDE-17107 Visual Preview: CSS and images very often don't show up after refresh / editing

- disabling file caching
JBIDE-17083 Visual Preview: Implementing scrolling and ui selection for refresh options (automatic refresh / refresh on save). Changing refresh icon. Refactoring