About image viewer, I have 3 suggestions below. I had to look up CSD which apparently is something about the program not honoring the native window settings? That was a little beyond me as I wouldn't know how to tell just by looking if something has CSD or not, sorry for my lack of knowledge. Anyway though, I have been doing research on pic viewers that can handle very basic edits, and I do have suggestions below, along with my screenshots so that people can see them.
Like [member=6811]Oobuntus[/member] I also use gThumb (I set my images to default to open with it) but from what [member=2]Jerry[/member] said I completely understand it's not a viable option for LL 4.0.
I also tried GPicView that Jerry suggested, but I couldn't find a way to do crop or resize with it, although it can do rotation.
Here are the 3 options (one of these is Nomacs, which others have also suggested). I've included 2 pics for each: 1 pic showing the application "as is" and the other pic showing what users would click on to crop or resize. Please correct me if any have CSD; I don't know how to tell by looking.
My opinion: of these 3, I like Mirage by far the best, mainly because it's just what's needed from a simple viewer that can handle minor edits. I wasn't as keen on Nomacs or on Phototonic because a) the menus look old-style and b) they're able to do "too much" and then not only is it a slightly more confusing UX for new Windows users, but also then it gets closer into Pinta and Krita. I feel that would be steering further away from minor edits and getting into something a little bit more complicated and closer to Gimp, which is not necessary. That was just my personal opinion though; I realize that this is subjective. Phototonic's crop tool is not very intuitive, so although it can technically crop, it's not as easy to use as the other two for that.
I also tried out Viewnior, but it can't handle resizing (or at least I couldn't figure out how to get it to do that).
The following are available in Synaptic (or at least, that's where I got them from):
1. Mirage:
2. Nomacs:
3. Phototonic:
The black box on the top of the window is just me obscuring the full path of the image.
Using Linux Lite for everything now. I put it on my desktop and my laptop. Woohoo!