Better Nested Folder Navigation in Toolbar w/ Hotkeys#5089

Currently, when subfolders are used, <Tab> (or whatever it’s been configured to player-side) only switches the variant in the highest level, forcing players to use the mouse for the previous navigation levels. The base level uses <1–9> and is always accessible. An example image is attached.

Proposal: Allow players to navigate nesting vertically with a hotkey, be it cyclically (similar to current Tab behaviour) or up and down nested levels with two (e.g. <-> and <=> or some other combination). This would allow relatively easy contextual navigation regardless of folder depth purely using hotkeys.

Default behaviour would be to move to the next level up as folders are opened, (current behaviour).

While ‘Cycle Slot’ exists, it only helps for this first level of nesting (A/B/C tends to still require the use of a mouse) and loses convenient deselection. I feel like the above implementation might be preferable as it’d support arbitrary folder structures.