This is consitantly reproducable on Firefox, and sometimes on Chrome.
Attached video is Chrome.

1. Footer is covered by treeview in first subapp on Firefox

To reproduce:

• Open definitions app on OSX Firefox.
• Shrink the height of the browser by dragging the bottom of the browser up.
• Notice that the footer dissappears under the treeview.
• It stays hidden until you click on a row, then it reappears.

2. Treeview does not expand vertically on Firefox

To reproduce:

• Open definitions app on OSX Firefox.
• Expand the height of the browser by dragging the bottom of the browser down.
• Notice that the treeview does not expand down, there is just a big white gap under the tree.
• It stays that way until you click on a row.

Problem does not occur on OSX Chrome or OSX Safari