XXX: hardcoded values in albums tab

[Matt Layman]

entertainerlib/frontend/gui/tabs/albums_tab.py lines 39-42:

            # XXX: laymansterms - This is "less than elegant." I'm not fixing
            # ImageMenu right now so we can't get rid of tex_size_x and y yet.
            # We really need to eliminate the concept tex_size_y, but it will
            # have to wait for now.

ImageMenu takes the vertical hieght for its item size but that value should probably be calculated relative to the width desired and the size of the content. Because ImageMenu can't handle that right now, some hard values exist in the albums tab that probably shouldn't.