add send to genfam in FastaView
added unique download and export sessions

* Downloads and exports are now isolated
* Annotation file is only added when annotations are available
* Minor formatting changes
add header information and fixed columns
add export and download filename to the dialog
add additional genome data to GenomeInfo
add missing template parameter
added spinner for feature loading
add support for feature exporting
tweak export features dialog message
display view button when logged out