Add a 6-cell mini-gauge at the right edge of the cursor row that
shows the cursor file's size as a fraction of the largest file
in the current directory. Uses block characters (filled/empty)
in the accent colour over the cursor background. Only renders
for non-directory entries on the active panel, so directories
and the '..' parent entry skip the gauge.
This gives an instant visual sense of relative file sizes
without needing to read the numeric size column.
Tests: 1388 pass, zero warnings.
vasilito
aa3367acd2