ANN: ... button that shows all commands for a frame (accessibility/usability improvement)

[williamstein]

In CoCalc when you split a frame there were "less important" commands that would disappear off the screen, due to lack of space. Now you can click the "..." ellipsis button, which is always visible, to see all commands in a popup:

This popup is visible exactly when the corresponding frame is focused, and you can close it by clicking the x to the right or clicking the ... button again.

CoCalc extensively uses Ant Design 5.0, which adds this sort of "..." to show anything not visible functionality all over. You'll also notice it, e.g., when there are many tabs for open files or projects.