adding the possibility to show the map screen from the explore screen
fix missing about texts
fix wrong inheritance of dialog fragments
Merge branch 'develop' of https://github.com/MathieuCalba/mix-it-android into feature/fix-display-of-map-screen
Merge branch 'feature/fix-display-of-map-screen' into develop
Merge branch 'develop' of https://github.com/MathieuCalba/mix-it-android into feature/editing-ui-styles

* 'develop' of https://github.com/MathieuCalba/mix-it-android:
  fix wrong inheritance of dialog fragments
  fix missing about texts
  adding the possibility to show the map screen from the explore screen