Thanks for the reply!
Shortcuts to toggle the view for bones, slots and images would be useful for me. Thanks for pointing out the right clicking adding to the filter, that has helped right now with the filter button.
Personally I switch the view for bones, slots and images quite a lot to declutter the hierarchy tree while I'm working on specific aspects of an animation. For example, when I know I'm not going to be animating the images basically at all, such as in an idle standing animation, then I prefer to work with only bones visible. If I suddenly want to turn the images on quickly because one foot is just not right: now instead of that one click to turn those images on in the tree and then one to turn them right off again, there comes a right click and potentially another right click if my previous filter setting didn't have the images set on. Clicking one tangible button in the moment felt much more natural.
If I make an animation using loads of images, I usually set up my animation keyframes with the pose and images I think I'll use, then turn images view in the tree off to work on tweening while concentrating on the bones only. Perhaps flicking the images on at some point to add in a blink only to turn it off again. I only sometimes turn slots on for when the rare alpha and colour changes come in towards the end of my animating process, so since that's rare it will require tweaking the filter, which then may be tweaked again within a minute or forgotten and left in the filter only to annoy me in the next moment.
It might just be my way of working, and I'm so used to it that this change has just shaken my routine and I'm instinctively reaching my wacom pen up to toggle those buttons and then clicking a no-longer-existant button before realizing I must click and right click a few more times on the funnel. I also hardly ever work with all 3 bones, slots and images showing, so turning the filter off is rarely something I'd do.
Maybe the new way works for some people though, but I do miss those buttons being there in the open.