Force subplots to have the same aspect ratio

[paulmueller]

The aspect ratio is currently determined somehow by pyqtgraph taking the available space into account.

Pyqtgraph currently does not seem to have a feature that allows to make all plots the same size (such that if you overlay the plots, all axes and ticks would coincide).

[chrherold]

one comment on that: subplot size seems to depend on the plot title

[paulmueller]

yeah thanks, saw that too 🙄

[paulmueller]

Currently we are using pg.GraphicsLayoutWidget. Maybe we should use QGraphicsGridLayout - maybe with setColumnFixedWidth.

[paulmueller]

Workaround is to create an empty title label and anchor another label to it, see 616b71b.
See https://ci.appveyor.com/project/paulmueller/shapeout2/builds/37925366/artifacts for a preview.