Easier style use/navigation in "normal" cases

[mortengf]

After applying one of the "Heading" styles to some text, the "Body text" style from the same design, should be selected. This would avoid the scroll logic scrolling to a different part of the designs list and in most cases the user probably wants to use the "Body text" style from the same design as the heading style he/she selected.

Currently, "Body text" from the default ("simple-bw") design is selected.

@Abekonge Do you know if this is already described in an issue?

[Abekonge]

@mortengf I don't think this is described in an issue. Also I'm not sure it is a good idea - we have a challenge in making the design logic understandable for the user, and changing rules like this might make it more incomprehensible. If people want more than just a non-default heading - we want them to change the design for the chapter or ebook by conscioss decisision.

(We could consider making the "apply to chapter" and "apply to ebook" more visible - so users can consider that without opening the menues first.)