fix csv file names

[floesche]

This should fix #130

[leburnett]

This works. The only thing I noticed when I tried it is that the tables from R, L and C pages all save as just the cell type name. I updated the filename again to include the soma_side so now it saves as "downstream_partners_output_Tm3_combined". or "downstream_partners_output_Tm3_right" etc. If you can think of a reason why we shouldn't do this feel free to revert.

[floesche]

Thanks, that looks good. I was wondering, if we should encode the state somehow in the filename as well? For example, if you filter by a certain text connection strength, then the downloaded file contains a subset of what the file promises. Or do we leave that up to the user?

[leburnett]

I think this could be a good idea. I'll look into it.

[leburnett]

This should be included in the most recent commit. I've also updated the ROI table's filename too. At the moment the minimum number of connections or percentage (for the ROI table) is included in the filename with a decimal point. I was debating whether to change this to a dash, but the decimal point doesn't seem to cause a problem. I can update it if you think it would be better though.

[floesche]

That would not include the sort order, would it? At this point I am almost leaning towards a more simple file name.
If we want to keep the more complicated, it might be useful to use a named function instead of 3 anonymous functions that all do the exact same thing.

[leburnett]

I don't think the sorting order really matters because the user can resort the data afterwards, but the data in the table is determined by the slider value so I think that's worth including. I have added a named function in the most recent commit.