[JBIDE-15899] correcting wizard title (was: always "Select Domain")
[JBIDE-15905] add Eclipse preferences to set client read timeout
[JBIDE-15813] dont loose selected domain when getting back to wizard
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[JBIDE-15968] determine env var support via domain or application
    
Before this fix we were determining if env var could be edited by
querying the application. When creating a new application we have none
yet, we have to query the domain to find out about env var support