Adds a MultiBlock to store each plotted mesh.

[jeffreypaul15]

MultiBlocks work as an array of meshes.
Field lines are added into a separate MultiBlock which is then added to the MultiBlock of the plot.
We need to find a way to refer to each mesh other than it's position in the MultiBlock, but I think that can be done later?

[nabobalis]

We need to find a way to refer to each mesh other than it's position in the MultiBlock, but I think that can be done later?

You mean by name?

Could you add a test for these changes please?

[jeffreypaul15]

You mean by name?

Yeah as of now once converted to a MultiBlock thery're part of an array, would it be wise to store a dict of all the meshes
corresponding to it's position in the array?

Could you add a test for these changes please?

Yeah, at the time none of the tests were written, I'll add them in today.

[nabobalis]

Yeah as of now once converted to a MultiBlock thery're part of an array, would it be wise to store a dict of all the meshes
corresponding to it's position in the array?

I think its fine.

[jeffreypaul15]

I think its fine.

I'm sorry, I didn't quite get you, fine as in fine to go ahead with it?

[nabobalis]

I think its fine.

I'm sorry, I didn't quite get you, fine as in fine to go ahead with it?

Yeah

[dstansby]

Looks 👍 - the new all_meshes attribute should be documented in the docstring of SunpyPlotter. This can be done by adding an

Attributes
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section underneath the parameters section.