documentation

Pull request #2870: feature/ZBXNEXT-9827-7.3-D. Host Wizard.

Merge in WEB/documentation from feature/ZBXNEXT-9827-7.3-D to release/7.4

* commit '17f2e8ab7a2a6a3b754d435b8348ea98a8473091':
  [ZBXNEXT-9827, DEV-4363] updated paths for files
  [ZBXNEXT-9827, DEV-4363] updated paths for images & files
  [ZBXNEXT-9827, DEV-4363] updated absolute paths to relative paths for images & files
  [ZBXNEXT-9827, DEV-4363] added instructions for making custom templates compatible with the Host Wizard
  [ZBXNEXT-9827, DEV-4363] added template bundles (minor file naming & wording update)
  [ZBXNEXT-9827, DEV-4363] added template bundles
  [ZBXNEXT-9827, DEV-4336, DEV-4340] Host Wizard (update after PR review)
  [ZBXNEXT-9827, DEV-4336, DEV-4340] Host Wizard (added latest changes; fixed shortcomings)
  [ZBXNEXT-9827] Host Wizard (moved What's new entry)
  [ZBXNEXT-9827] Host Wizard (Upgrade notes wording update)
  [ZBXNEXT-9827] Host Wizard (What's new & Upgrade notes)
  [ZBXNEXT-9827] Host Wizard (template export format; added footnote)
  [ZBXNEXT-9827] Host Wizard (API); clarified "hostmacroid" and "hostid" description
  [ZBXNEXT-9827] Host Wizard (template export format)
  updated "Export format" section structure
  [ZBXNEXT-9827] Host Wizard (wording/list formatting changes)
  [ZBXNEXT-9827] Host Wizard (wording/formatting/structure changes)
  [ZBXNEXT-9827] Host Wizard (API)
  [ZBXNEXT-9827] Host Wizard (template upgrade)
  [ZBXNEXT-9827] Host Wizard (base feature)