Hi
Some dockers seem to disable the ability to resize the side bar horizontally. For instance when I add the palette generator on the side I cant make the sidebar wider.
Hi, because Palette Generator is a community plugin and if you read its code, a decision was made to make a maximum size for its geometry : PaletteGenerator/PaletteGenerator.py at main · kaichi1342/PaletteGenerator · GitHub
Just report your issue on the thread of the plugin, IMO, or tweak the code to get a super large maximum size.
Thanks for the reply. I will edit the script. I am just wondering why there is a hard limit? PaletteGenerator was just an example, I seem to have similar side bar resizing issues with other tools as well. I wonder if there is an easier way to handle than editing every problem docker manually like this?
Is this issue just based on the plugin dockers? I felt like I had issues with internal ones too but I have bunch of plugins installed so I am not sure what is a plugin what is not at this point.
i think you can remove the max-size and you can resize it how big you want. The inner color-boxes adopt to the size of the docker so there is no issue there .
I made this plugin with idea of it being a floating docker. How I use it when I paint. 
I didnt thought that someone would want it to other part of the screen.
Also my aesthetic loving self just didnt like the look of overstretch color boxes XD so I put a limit to the size.
I remember that LUT docker has a minimum width limit, but it should become more flexible in newer version (my understanding after reading this)
Been speaking about that for years.