Don't reset the axis limits / zoom for same Axis spec

[SimonDanisch]

This tries to keep zoom levels etc, if the axes match exactly when re-using, since we assume the user intention is to move that axis, without resetting it:

p1 = S.Heatmap(rand(4, 4))
p2 = S.Heatmap(rand(50, 20))
ax1 = S.Axis(plots=[p1]; title="Axis 1")
ax2 = S.Axis(plots=[p2]; title="Axis 2")
grid = S.GridLayout(ax1, ax2)
f, ax, pl = plot(grid)
# swap axes while preserving zoom etc
pl[1] = S.GridLayout(ax2, ax1);

[MakieBot]

Benchmark Results

SHA: b8828bd0dad8e29bcb8d4824e0710da16b3d3188

Warning

These results are subject to substantial noise because GitHub's CI runs on shared machines that are not ideally suited for benchmarking.