[TASK] Move field "bullets_type" to tab "Appearance"

Currently the field "bullets_type" is displayed in the "General" tab below the "body text" field. This field is about the appearance of the bullets, and should be in the according tab

This patch moves the field to the appearance tab
[TASK] Array for bullet list should be according to type

The controller is producing a multidimensional array for all types in content element "Bullet list". This is done for the added definition list. For <ul> and <ol> a strange construct is needed this way.

This patch changes the behaviour by sending a simple array to the view for <ol> and <ul> and a multidimensional array for <dl>, which has two columns.