Crowdin recreates YAML files with indent specifications which Spyc does not
currently handle:

body: |2
  body contents written
  here with 2 leading spaces

This is part of the Yaml spec after 1.0

backportme

Ticket numbers are now configurable as a system-default and by help topic.
Previously, an administrator could select between six-digit random and
sequential numbers. Now, the sequence is selectable so multiple sequences
as needed, and a format can be specified to define how the ticket numbers
look. Formats can also be defined for each help topic.

Remove retired navigation background image

Fixes #145

And use admin-defined site logo

- Proofread large portion of help tips.
- Implement help tip links in YAML files.
- Fix GUI spacing of some elements.
- Add <label> tags to a few form elements.

    * Titles of other items in bold
    * Configuration options shown in italic
    * Mute the help tips when not focused