make code for custom sections editable (with own templates)

[frontendschlampe]

In the current fe_page I can't edit the code of custom sections. It's hard coded somewhere but it would be better if there is an own template for custom sections because sometimes you have to change the syntax or the classesIID's for example when you use bootstrap or YAML.

[aschempp]

Related to #6496

[leofeyer]

As discussed on Monday, April 28th, the custom sections should use a separate template which can be customized and is selectable in the function call.

$this->getCustomSections('top', 'cs_default');

[frontendschlampe]

+1

[bekanntmacher]

+1

[leofeyer]

Implemented in cb0d950.

[bekanntmacher]

Thanks a lot!