documentation

Pull request #2201: DEV-3994 comments on item key usage, small corrections, formatting.

Merge in WEB/documentation from feature/DEV-3994-7.3-D to release/7.4

* commit '05c405d431fe2bda7748b78cd6ce83c07eeaf68d':
  DEV-3994 list rearrangement to ensure proper rendering.
  DEV 3994 improved examples structure.
  DEV-3994 deleted unnecessary sentence.
  DEV-3994 corrected logrt.count examples.
  DEV-3994 improved structure and clarity.
  DEV-3994 comments on item key usage, small corrections, formatting.