Fix for problem of collapsing root node in tree widget.
Fix for bug in tree and msa widget related to change of width when
window is resized.
Pan-genome widget was added (renamed from 'PanGenomeGeneExport' with
some changes).
Pan-genome widget is done (in Narrative repo).
Merge remote-tracking branch 'origin/master' into dev-aug_demo

Conflicts:
	src/biokbase/narrative/services/microbes_demo.py
More changes related to pangenome widgets.
Merge branch 'dev-aug_demo'