Bug report: Panes do not resize correctly when opened in a small window

__Issue__
When the application opens in a small window, the panel sizes do not adjust correctly when the application is maximized. You are required to refresh the app for it to be usable. See below

__Reproduce__
1, Open the the application in a small window (not a small native window, but for example, open the browser, then make the browser small, then open the app).
2. Maximize the window

__Expected Behavior__
The app should resize as if you opened it in a maximized window

__Screenshots__
First opening the app in the small window
After maximizing the window

Reproduce the issue by opening the app in a small browser window, maximizing it, and comparing the pane layout before and after refresh. Trace the pane sizing behavior during the window-size change; done means the panes resize correctly on maximize without requiring a refresh.

Written by the indexing model from the issue text.