Make tooltip for Offline Mode setting wrap properly.

Qt wraps tooltip texts automatically when it detects the text to be Rich
text. Embed the tooltip text into <p> tags to get it recognized as such.
Manually update translations to avoid the need to retranslation that
line.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@28117 a1c6a512-1295-4272-9138-f99709370657
17 files changed