Initial column widths can be too small and cut off

[rogermparent]

Currently, the default column widths of the experiments table aren't aware of the lengths of the data and headers they contain, so they can be cut off by default. While truncation from #1142 makes this not look absolutely broken, some columns being truncated by default could be considered a bad look that we need to fix considering something like native HTML tables adapt to their contents' widths.

Screenshot of default widths with a slightly contrived example of columns that exemplify this:

Do we want to tackle this directly and make column widths adaptable by default, or are related solutions like #1142 and #1259 enough to make this a non-issue? If it's the latter, we may want to add title attributes to cells as well as headers (really, we may just want to do that anyway).

[mattseddon]

Looks like the way that we are handling the width of the table/columns will be changed in #1565. Closing this.