Improve model selection workflow to keep model metadata visible

[vanaukenk]

From 2020-09-18 call:

When selecting models to review, once the first model is selected the resulting new window covers up some or all of the model metadata listed in the landing page table. (Screenshot from @vanaukenk 15" MacBook)

It seems we have at least two options for improving this:

1. Set a fixed width on the ART window so it doesn't overlap with the model metadata
2. Have curators select their models but only open up the ART window when they've finished selecting

Other possibilities?

@tmushayahama @lpalbou @ukemi

[vanaukenk]

Dup of #24 - maybe due to github 404 error? Closing