Problem with sidebar sizes.

[Anders Lund]

 Hi,

There is a problem with the sidebars (mostly the right one) in the current 
version (latest on archlinux, 5.2.0). They can not be rezised below a certain 
width. This is a common problem with qt widgets afaik but it can be avoided - 
and it worked in prior versions. On my screen, the space available for image 
display becomes small to the point where it disturbs workflow and 
functionality.

Kindly,
Anders