The memory and CPU graphs fail to display anything when the memory size
is larger than 2**31 bytes, because of the small range of int. This
commit makes replaces the type with size_t. Hopefully nobody will have
18 quintillion bytes of memory before this gets replaced. :^)
SPDX License Identifiers are a more compact / standardized
way of representing file license information.
See: https://spdx.dev/resources/use/#identifiers
This was done with the `ambr` search and replace tool.
ambr --no-parent-ignore --key-from-file --rep-from-file key.txt rep.txt *
Currently, graphs are defined in terms of graph color. This means that
when the system palette is changed, the old colors are still used. We
switch to storing the color roles and looking up the palette colors on
paint events. We also define the graph line background color as the
graph color at half-transparency.
