Bug 466999

SUMMARY
Documents are often viewed across multiple pages at once, e.g. for reading a text that describes a figure. For this, the thumbnail view of okular is very handy since it enables viewing two pages (e.g. text and figure) of the same document at the same time, without the need to open the document twice. The width of the sidebar that displays the thumbnails, however, is limited (to a small size).
I would like to increase the width of the sidebar of okular to an arbitrary value.  

STEPS TO REPRODUCE
1. Open document with Okular
2. Settings -> Show Sidebar -> Thumbnails
3. Click+drag sidebar to the right. Maximum is reached at already ~1/5 (?) of total screen width

Thanks a lot for consideration. Cheers,
Chris