Moved the sorting dropdown to the area where description is

Signed-off-by: emanuele <emanuele45@gmail.com>
Scrolling pages

Signed-off-by: emanuele <emanuele45@gmail.com>
Inverted the movement

Signed-off-by: emanuele <emanuele45@gmail.com>
Fix the scrolling in "borderline" conditions and some positioning

Signed-off-by: emanuele <emanuele45@gmail.com>
Temporary background for pages in MessageIndex

Signed-off-by: emanuele <emanuele45@gmail.com>
Make it (partially) accessible by keyboard

Signed-off-by: emanuele <emanuele45@gmail.com>
Merge pull request #833 from emanuele45/moving_sort

Moving sort