edges in analysis network; handdling of node labels, replacing by chosen identifier if unset instead of netexId; handling of multiple ensg numbers for same node missing

fix dashed legend when colored background; node analysis style half fixed; default nodes style huge somehwoe

node styles, handle seed node styles and different user inputs properly, complement user inouts where necessary; using deep copy where necessary to fix missing style updates; load expression information and use opacity to display it to also affect images; toggle drug view in explorer network

rename node attribute name to label in user input; make node attrbitute label optional, defaults to ID; Double identifier might be problematic, if node label is e.g. gene symbol, then it will be displayed twice in detail information, once as label and once as symbol