picture-related changes/fixes

- fixed log picture editing
- removed obsolete code for map pictures
- added help links to some galleries
- fixed enlargit cursor hotspots
- enlargit fine tuning, enabled dark background
map fixes and details

- increased map picture description font
- fixed old-MSIE warning
- optimized XML and JS escaping
updated and optimized setting files; updated db changelog
purged javascript: qualifiers
v3.0.5 code review: lots of small fixes and cleanup

- fixed nano selection in search form
- removed unused, duplicate thumb replacement pics
- freed mysql result in lib1 helppage-link generation
- fixed logpic-is-on-first-page calculation
- fixed and improved user option set handling
- readded map dragzoom
- improved log pic pages layout
- user pics page counter fix
discarded html preview function