This menu is circular and shows all the signs as well as the crossbow, pockets and a bomb slot.
In battle, once I have used all the bombs equipped I have to access my inventory then select another type of bomb
and drag it into the quick menu bomb slot. I then must access the quick access menu to select the bombs, all this while
fighting. I have just viewed a video where someone used up all the equipped bombs and without accessing the inventory
replaced the depleted bombs with another type. How is this done? It would make equipping so much simpler and quicker.

They might of been using a mod.