Multi-panel plot readjusts plot padding

[forbiddenpersimmon]

When making multi-panel plot, BPG changes passed in trellis objects padding in order to align them. In an edge case where y-axis label and tick mark labels are moved to the right side in one plot, this causes the actual area/axes of the plots to no longer line up.

When labels and ticks are on the left, no problems with padding and alignment:

When on the right, left side of plots are aligned but right side is squished:

Adjusting padding of individual plots does not work since create.multipanelplot readjusts padding on its own after plots are passed in. Current workaround is to make and pass a text grob to plot.objects.