improves the top menubar

providing:
* active items are displayed in white (this was broken)
* the name Adagios in the top left is now a parameter
* the displayed elements are parameters as well
better doc for topmenubar in settings
fix: left sidebar: active item
improves the top menubar

providing:
* active items are displayed in white (this was broken)
* the name Adagios in the top left is now a parameter
* the displayed elements are parameters as well
better doc for topmenubar in settings
fix: left sidebar: active item
Merge branch 'feature-better-topmenu' of github.com:matthieucan/adagios into feature-better-topmenu

Conflicts:
	adagios/templates/base.html
fixes bug due to other pull request: json-preferences

who taught me to merge? :)
fix url
Merge pull request #356 from matthieucan/feature-better-topmenu

Feature: better topmenu