[Feature Request] Collapse-all option to minimize all environment groups OR start all environment groups minimized.

[nirbhayjm]

I'm always frustrated when I have often have too many environment groups and I have to click every single environment group to minimize. The groups get maximized every time the webpage is refreshed.

Solution 1 (preferred): Add a button which will collapse all environment groups with a single click.
Solution 2: Start all environment groups minimized

[nirbhayjm]

Commenting out treeDefaultExpandAll at
https://github.com/facebookresearch/visdom/blob/1b9b7993e566263fe38733f6dbb4974d4deb5cda/js/main.js#L1361
will be solution 2 i.e. it will start all children collapsed.

[shahmeerkhan12]

Is this issue open to contirbute