modified settings styles and backup/restore button positioning.

Highlight initial labels in settings, it helps to section off the
screen.

Moved backup/restore buttons to top.

Widened settings width 2 columns because it looked lopsided. This
increases width of textareas but we can put width limits on those
separately to make them look better.
make width consistent on all app settings sections.

10 cols wide, 1 col offset on each side.
moved restore/backup buttons under header.
upgraded to semver 2.1.0, fixes garden20#60
added long_description to kanso.json
Merge pull request #59 from mandric/master

settings layout/formatting tweaks