Plots not automatically resizing when maximised

[pgleeson]

To reproduce:

• Load NWB ile, e.g.http://nwbexplorer.opensourcebrain.org/?nwbfile=https://api.dandiarchive.org/api/assets/f9a896d5-a007-4f19-a80c-6d0650e9356a/download/
• plot one time series

- press maximise in top right corner of plot - frame expands but window doesn't

• when plot is resized it notices and resizes the plot to the window
• when plot is restored to original size, it also doesn't resize correctly