Rework add_guides
for arbitrary guide positions
#339
Merged
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This PR updates patchwork to deal with tidyverse/ggplot2#5488.
Briefly, if tidyverse/ggplot2#5488 gets merged, guides will always have 5 positions in the gtable for left, right, top, bottom and inside positions. This eliminates the need for {patchwork} to work in missing rows/columns of the gtable. Collecting guides from a gtable on the other hand, requires grabbing the guides from 5 guide-boxes instead of 1.
Some visual tests changed at the svg level due to some slight rounding changes, but for humans they look exactly the same. This isn't a consequence of this PR, but of changes in the dev version of ggplot2. Hence, I didn't include those snapshot changes.