[JBIDE-17611] Error when calling Tern code assist via command

Update preferences for Node.js at startup and set first none native as default
Remove duplicated org.eclipse.ui dependency
Added a preference that disables repeatable Node.js config change

Signed-off-by: vrubezhny <vrubezhny@exadel.com>
[JBIDE-17566] tern integration is not working OOTB if node.js is not installed

add "x-installation:=greedy" for optional tern.node platform specific bundles
JBIDE-17479 Add reference to JS/CSS dialog is empty

Algorithm for controlling left panel of wizard is modified
and checked both for Linux and Mac OS.