graph panel

[jhnnsnk]

• [x] legend outside of panel or box around bars
• [x] delay at max should give an overview of the whole simulation duration
• [x] xticks of delay in better steps
• [ ] needs review for raw data
• [ ] nicer yticks (currently hardcoded: 4 equally spaced positions chosen with respect to the maximum value)
• [ ] separate control for data scaling
• [ ] rounding error (for some selected time window, the display turns black)