translation and CSS anchors

Merge please the first three commits into one, if possible.
I just made links more visible in help, cause while I was using app, I didn't recognize it as links. If you don't agree, just remove it.
When you didn't change theme, it didn't save language. When you didn't change language, don't have to reload whole page.
Sorry for closed PullRequest, I just don't know how to PullRequest only some commits.