Show basic toggle icon, to show and hide playing info.
Should be extended in the future to still display some basic playing info in minified form.

Signed-off-by: Diego Gaustein <diego@gaustein.com.ar>
Replace $('#Panel') with self.el
Signed-off-by: Diego Gaustein <diego@gaustein.com.ar>
Fix bug when viewport has been scrolled down
Signed-off-by: Diego Gaustein <diego@gaustein.com.ar>
Merge pull request #118 from inaes-tic/toggle-header

Show basic toggle icon, to show and hide playing info