AF transmission network: basic

[MennaRempt]

A few basic fixes for the AF transmission network:

• Name: the name in the upper left corner of the network should be changed to “AF transmission network”
• The author names on the left break off if they’re too long for the allotted space; they should either get more space or wrap.
• The look of the network visualisation changes when it is downloaded (font, colours etc.). It should remain the same (or as close as possible) as online.
• When the network is downloaded the legend with the node colours to author names should be included in the download

[shariboodts]

Since we have decided to make the transmission network invisible, this issue may be ignored.