This fixes the sizing of floating non-view containers. On master, the
floater will get set to the maximum width and height, which by default
is the entire output layout. When setting a non-view container to
floating, this will set a sane default size of 50% of the workspace
width and 75% of the workspace height, or whatever the closest is that
the minimum and maximum floating width/height values allow for. On all
future calls to `floating_natural_resize`, the width and height will be
kept unless they need to be changed to respect the min/max floating
width/height values.
0676ace97f