new LAF images, new AboutBox
enabled context help for all data nodes
context help is shown for meta data elements
removed further mentions of beam or visat from help
removed mention of visat
exchanged Sentinel-3 Toolbox with Sentinel Toolbox
activate search index generation for some modules
Merge branch 'master' into nestmod
update help header
disable dbQuery
remove nestIcon
check if product exists, ask user
Merge branch 'master' into nestmod