Fix Legend about reptate HOT 4 CLOSED

How to select the labels for the legend?
Maybe allow the user to specify something like ${Mw}, knowing that the files contain that parameter?

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A problem with this is that, when the user sorts the files in the DataSet, the series in the matplotlib figure are not sorted accordingly and, therefore, when the Legend is shown the order of the series in the Legend corresponds to the order in which the series were added to the figure.

from reptate.

Right now, the legend only shows entries in the current dataset. The items in the legend are shown in the same order as the items in the Dataset. The user must uncheck and check the legend again to see the changes.
We need to implement options (font, size, columns, etc) for the legend.

from reptate.

I think it works! Options are accessible from the Markersettings dialog.
The legend label can be modified by using a parameter of the file. For example "Mw=[Mw]" will be replaced by "Mw=1131.0" if the parameter Mw in the file has that value.

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