Custom Graph for section Weather and/or Miscellaneous

[Toulon7559]

Under tab 'Temperature' there is a selection Custom Graph [~Aangepaste Grafiek] which allows to combine various values in 1 (new, combined) graph.
Would also be nice to have that function under the tab 'Weather': probably minor effort to copy the same selection-function from the Temperature tab under that Weather tab [?]

For comparison of values under tab 'Miscellaneous' also an interesting feature, although I appreciate that the choice/compilation of the Y-scaling may become a problem, because probably additional parameters are required for scaling, beside degrees, percents, hpa, as applicable under 'Temperature' and 'Weather'.
E.g. for 'Light/IR/UV' you need Lux, W/m^2 and/or UVI, 'Power/Energy' is expressed as W and kWh, and some values may have no dimension (just 'Units').
Nevertheless, as example it would be interesting e.g. to compare in 1 graph Power relative to Light-level.