there is no "toggle" button for album browser but you can just use the "M_BBAA_" and replace it with one of the buttons on the left side....example- in my skin im working on HERE you seee the "album button" what was there before that was the "foward" button, i just replaced the "MODE_FWD" with "M_BBAA" - it looks like this:

Orginal-
MODE_FWD_LEFT=0.000000
MODE_FWD_TOP=19.140625
MODE_FWD_WIDTH=10.375000
MODE_FWD_HEIGHT=10.000000

BBAA Button-
M_BBAA_LEFT=0.000000
M_BBAA_TOP=19.140625
M_BBAA_WIDTH=10.375000
M_BBAA_HEIGHT=10.000000

now what you be cool is that if there was a way to bypass the "click here for browser" so that once you click on the button it brings you right too your albums