Improve plotting behaviour and labelling #427

Job	Run time
Cache for 3.10 on ubuntu-latest	18s
Cache for 3.11 on ubuntu-latest	27s
Cache for 3.12 on ubuntu-latest	26s
Metrics & Graph Stats (3.10 on ubuntu-latest)	6s
Approaches (3.10 on ubuntu-latest)	6s
Partitioning Base (3.10 on ubuntu-latest)	6s
Partitioning Rest (3.10 on ubuntu-latest)	6s
Population (3.10 on ubuntu-latest)	6s
Attribute (3.10 on ubuntu-latest)	6s
Plot (3.10 on ubuntu-latest)	5s
Utils (3.10 on ubuntu-latest)	7s
Metrics & Graph Stats (3.11 on ubuntu-latest)	6s
Approaches (3.11 on ubuntu-latest)	6s
Partitioning Base (3.11 on ubuntu-latest)	4s
Partitioning Rest (3.11 on ubuntu-latest)	6s
Population (3.11 on ubuntu-latest)	5s
Attribute (3.11 on ubuntu-latest)	6s
Plot (3.11 on ubuntu-latest)	5s
Utils (3.11 on ubuntu-latest)	6s
Metrics & Graph Stats (3.12 on ubuntu-latest)	5s
Approaches (3.12 on ubuntu-latest)	5s
Partitioning Base (3.12 on ubuntu-latest)	1s
Partitioning Rest (3.12 on ubuntu-latest)	1s
Population (3.12 on ubuntu-latest)	1s
Attribute (3.12 on ubuntu-latest)	4s
Plot (3.12 on ubuntu-latest)	1s
Utils (3.12 on ubuntu-latest)	1s
Merge Coverage	1s
	3m 3s

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