Dragging the pane's border fails to adjust its height (in the right pane of Tree and Clique tabs only)

[johnwdubois]

Bug

• The height of the right pane gets out of sync with the height of the left pane.
• The lower border of the right pane fails to drag (cursor doesn't change), so that right pane gets out of sync with the left, and then cannot be adjusted to recover.
• This bug applies only to the Tree tab and Clique tab.

To reproduce:

1. In the Tree tab (or Clique tab), drag the bottom border of the left pane to adjust the pane height.
2. See the problem:

• the right pane does not match the left pane
• the right pane cannot be adjusted (does not respond)

3. Clique on any tab other than the Tree or Clique tab.
4. Drag the lower border of the left pane.
5. See how the right pane height immediately changes to match the left pane height.
6. See that this "fixes" the pane height problem for Tree and Cllique tabs. (But the user shouldn't have to do this.)

What to do

1. Make sure the left and right panes get the same height automatically, whenever the lower border is dragged (whether the user drags on the left pane's border or the right pane's border).
2. The right pane's border should respond to being dragged in the same way that the left pane's border responds.

Screenshot