Hi Ching,
yes, this is what we usually do. Anyway, I think the workspace editor should has higher priority (this is my interest) while resizing the window rather than Available objects.
Each time when I am working with this block (you cannot imagine how many times ) I have to do strictly 2 steps:
1. resize window cause editor is not ready for user as it is ridiculously small (why not open it in half of horizontal screen resolution at least)
2. when I resize, the editor is still not usable, hence collapse Available Objects is necessary.
Not mentioning that double arrow <-> has 'sometimes' problem to grasp left-border of the window (what could be blamed on WIN 8.1 and I did not have a chance to try lower OS vers.) but overall impression of those two problems giving us a real headache (and lost productivity).
I was desperately checking files like bsh-2.1.8.jar under C:\DevTest\lib\shared to tweak it and deploy it back as part of hotdeploy with no success. Maybe it is still possible (I have no idea what/where to change) or this Available Objects injection is part of another build-in-script (screenshot) but this would be question for developers though.