Description:
It seems sidepanel have been redesigned from v.7. It is much clearer an "in the state of art" now but i was very sorry they can't be shrinked as before so the main document window could be set wide enough. It is especially annoying when "right" / "style" panel is displayed along "navigator" panel on the other side. Both can reduce main document (in Writer or Calc) to some half the screen width. But it is very annoying when trying to work on two different documents tiled windows.

Thus, with last update (manjaro) it seems that navigator window can't be tiled to the window's edge to become a panel anymore... crazyness ! doing so oblige user to tile navigator as a separate window, reducing the top toolbar width and add copmlexity in weindows navigation (alt+tab). 

Please could one fix these small settings to something as user friendly as previous v.6 ??? Thanks

Steps to Reproduce:
1. open two writers documents and tile the two windows side by side.
2. open style panel on the right side (shrink at max to reduce it's own witdth) and navigator as a panel on the left side (now it seem navigator can't be paneled anymore)
3. set zoom to "optimal width" and try to work on the text !!! :) (especially on low resolution screens)

Actual Results:
not user friendly for "hard working" on Writer's multiple documents (copy texte frome one to another for instance), or take notes on the go on complex hierarchized document during online lessons...

Expected Results:
side panels would be shrinkable to the boreder so main document frame could be displayed wider. 
Plus : arrows to expand side panel could be reduced or moved in iam to gain few (10-20) pixels of display.


Reproducible: Always


User Profile Reset: Yes


OpenGL enabled: Yes

Additional Info:
none