documentation

Pull request #999: Feature/ZBXNEXT-8078 7.0 D

Merge in WEB/documentation from feature/ZBXNEXT-8078-7.0-D to release/7.0

* commit 'ca4bf2338aebde73441084508aef1544541fefef':
  Added weirdly missing line
  reverted commit involving DE version accidentally
  merge conflit fix v2
  merge error fixed
  img name returned to short
  whatsnew700.md returned back the empty line between two block IDs
  screenshot changed
  hosts template added
  templates updated
  What's new changes revoked
  . added
  updated export template example (and WhatsNew page accordingly)