Change the fallback combo's action from TO(BASE) to LCK_BASE.
Since LCK_BASE explicitly clears the locked_layers bitmask,
it ensures that the keyboard actually returns to the BASE
layer even if a layer was previously locked.
The previous TO(BASE) action only updated the temporary layer
state, which was immediately overwritten by the persistent
locked_layers bitmask in layer_state_set_user().
rootiest
