Auto combine for components was removed in 1.1.6.0. You may need to take some single components back into your inventory and then click on them again for them to stack properly, but only for the one time. To stack items from your inventory into either the personal or transfer stash works as it always has: open, the relevant stash page, hold left-shift and left click on the item in your inventory to make it transfer. Items in the inventory bags should auto stack.
There will be no more expansions for the game, though there are a few more small content updates to come. Crate are focusing their attention on new projects they’re working on. A town builder which Medierra has been working on for a few years now.
And a couple of other projects which Grava and Zantai are spearheading.