WIP plot:  if tight==False, interpret subplot_params as absolute
ENH EelFigure:  ADD .set_xtick_rotation()
RF EelFigure:  collect layout parameters as *args, **kwargs
FIX plot.SensorMap2d
FIX plot.UTSClusters:  cluster Dialog
FIX plot.Histogram:  `pooled` argument
ENH EelFigure:  ADD `frame` and `taxis` arguments
FIX plot.Boxplot:  test=False
STY plot-uv:  _plt_barplot
FIX plot-uv:  _mark_plot_1samp font size
FIX plot-uv:  adjust pairwise connectors’ location based on `top`
FIX EelFigure:  default `tight=True`
STY plot.brain
API Result:  expose .find_clusters()
ADD plot.ColorBar
ENH plot.brain:  mask regions not in the data
ADD plot.PairwiseLegend
ENH plot.ColorGrid:  add `column_label_position` argument
ENH load.txt.tsv():  `empty` argument
TEST plot:  use eelbrain backend