I try to open the "Ontology and Annotation" import window ( File → Import → Ontology and Annotation...) in Cytoscape (3.5.1) for Ubuntu. Instead of the expected window, only the small thing like this appears on the screen instead (full screenshot here). Similar thing happens on Mac OS, and with an older Cytoscape version (3.5.0). It looks like a small window, which cannot be enlarged/maximized.
Is it a bug, or am I missing something?