Core Flickr access: move core components to sub-directory

Signed-off-by: Christophe Chapuis <chris.chapuis@gmail.com>
Context panel: add a contextual panel on the right side of the main view

Signed-off-by: Christophe Chapuis <chris.chapuis@gmail.com>
Tags: improve tag readability by adding a background to the tag text

Signed-off-by: Christophe Chapuis <chris.chapuis@gmail.com>