portlet-development - Fix language key welcome-x
Backport merge LRDOCS-531 edit theme thumbnails
Merge pull request #545 from jhinkey/portlets-lang-keys-6.1.x

Portlets lang keys 6.1.x
Merge pull request #547 from jhinkey/LRDOCS-531-6.1.x

LRDOCS-531 edit theme thumbnails for 6.1.x