[Libreoffice-ux-advise] UI for new line attribute line cap style

Hi all,

ODF1.2 has an attribute for the style of line ends. This is not 
implemented yet. I like to implement it. Therefore it would be nice to 
get some ideas about the UI from the experts here.

The settings belongs to the Line property dialog. So I have made up a 
first mockup of the changed tap page. 
https://wiki.documentfoundation.org/User:Regina/DraftLineCapStyle

I have divided the area of 'Corner style' in two parts and used the 
right part for the new settings for the line cap. This setting is common 
to start and end of the line and therefore cannot be put to the arrow 
settings.

I have shifted the right part of the array settings a little bit, so 
that they line up with the new drop-down-list and the preview window.

Your comments and ideas are welcomed, here and/or on my page.

Kind regards
Regina