Core: add some properties and signals to the FlickrReply object, to be able to better follow its lifecycle

Signed-off-by: Christophe <chris.chapuis@gmail.com>
Authoring: show flickr current running Flickr actions

Signed-off-by: Christophe <chris.chapuis@gmail.com>
Browser: fix items selection for photosets and collections of photosets

Signed-off-by: Christophe <chris.chapuis@gmail.com>
Core: implement Flickr sign out

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

Signed-off-by: Christophe Chapuis <chris.chapuis@gmail.com>
ContextPanels: By default, activate all the context panels. Rename "Edition" to "Actions".

Signed-off-by: Christophe Chapuis <chris.chapuis@gmail.com>
Browser: add icons to the main category buttons

Signed-off-by: Christophe Chapuis <chris.chapuis@gmail.com>
Merge pull request #6 from Tofee/work

Work