documentation

Pull request #722: Feature/ZBXNEXT-7469 6.4 D (improved Dev center version)

Merge in WEB/documentation from feature/ZBXNEXT-7469-6.4-D to release/6.4

* commit '0068d3162b10b90b4abd8b637c1d50bb890c883c': (46 commits)
  [ZBXNEXT-7469] updated widget presentation and configuration files
  fixing broken links
  [ZBXNEXT-7469] minor formatting fixes
  [ZBXNEXT-7469] Updated manifest.json description
  [ZBXNEXT-7469] added minor fixes to widget section
  [ZBXNEXT-7469] replaced tabs with four spaces
  [ZBXNEXT-7469] multiple formatting fixes
  [ZBXNEXT07469] updated manifest.json parameters
  updated file structure
  [ZBXNEXT-7469] updated widget description
  [ZBXNEXT-7469] updated widget presentation
  [ZBXNEXT-7469] added widget presentation
  [ZBXNEXT-7469] reverted image size change for scan directory
  [ZBXNEXT-7469] renamed file structure
  [ZBXNEXT-7469] fixed image sizes
  [ZBXNEXT-7469] fixed links and markup
  [ZBXNEXT-7469] refactored assets directory, added examples for host group auto permission module and module tutorial
  [ZBXNEXT-7469] updated links
  [ZBXNEXT-7469] updated module actions; removed old version
  [ZBXNEXT-7469] reworked module overview
  ...