Implemented search overlay ARCHIFY-1627
Skipping of items with no title, added close btn handler ARCHIFY-1627
Added disabling overlay confirmation
FF hack to fix the "Search" button on the popup
Removed close btn
Disabled confirmation handlers
Fixed google regexp
pushed version to 1.21, now seperate install.rdf for mozilla store & S3 deploymment.

Signed-off-by: Max Kossatz <mk@archify.com>