Options to show, hide or isolate a plot legends should be added

[IvanHeriver]

Current behavior and problem:

The button "show legend" open an image file. This means that one image per language must be created (wasted spaces, time consuming, difficult to track). In addition, the images are stored in the img folder of the documentations which doesn't make much sense, I think.

Expected behavior

I expect:

• the legend should be created dynamically within BaRatinAGE and use translated text.
• when clicked, the button "show legend" should:
  • option 1: the legend to be added next to the plot (the "show legend" could become a "toggle legend" button)
  • option 2: a popup within BaRatinAGE containing the legend (e.g. similar to what happens when you click "external figure")...

[JeromeLeCoz]

I prefer option 1, if feasible.

[benRenard]

I prefer Option 3: a 3-option radio button "legend", 1. none, 2. on figure, 3. external.

I think it's useful to isolate the legend (option 3) when you want to recombine several figures but use a single legend.