Target multiple experiments in the experiments table (webview)

[rogermparent]

Many commands can or must operate on multiple Experiments. If we want to invoke them from the table (and we will), we'll need a way to select multiple Experiments and invoke a command on them.

This behavior could take a few forms, chiefly inspired by file managers:

• Hold Control, chick one Experiment, then click another. Both are now selected.
• Hold Shift, click one Experiment, then click another. All experiments in between are selected.
• "Box Select" by holding down the mouse button and dragging it across multiple experiments.
• Shift/Ctrl + "Box Select" to apply the same modifiers on the box selection.

We'll probably want to be able to do all of these, both to match user expectations and provide ways to select multiple Experiments both individually and as a range.

From there, we'll need to recognize what commands can be run of which selections and/or handle when improper selections get through. That could even be its own Issue.

[shcheklein]

Pending @yalozhkin input on how do we want to do this selection.

[yalozhkin]

@rogermparent @mattseddon @shcheklein it seems the issue duplicates (relates) the #228.

[rogermparent]

it seems the issue duplicates (relates) the #228.

I think they're two separate issues that have some overlap, when I made the ticket for this mechanism, I particularly had Plots in mind. That said, the right-click based design added in #228 is flexible enough to handle all of these cases, so its implementation could very well solve both of these Issues.

[rogermparent]

This Issue a bit abstract, and would be better handled with a more concrete one like #228