Rounded box: Removes equal_spacing() as a preparation for using CSS flex
Rounded box: Removes equal_spacing() as a preparation for using CSS flex

When I implemented bkviewer, Firefox did not support CSS3 flex style.
Time has passed. Now morden browsers suport it.
I don't have no reason to keep the old handmade javascript code.

As a preparation before introducing flex style, this change removes
equal_spacing().

alprut/bkviewer2,alprut/bkviewer2