Configurable width data explorer cards (measurement/tag/field filters)

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**Proposal:**
The builder cards in data explorer should support being dragged from a vertical border to modify width. This will allow long measurements, tag names/values, and field names/values to be fully visible should the user so choose.

**Current behavior:**
Currently, long measurements, tag names/values, and field names/values result in text cutoff & the appending of ellipses.

**Desired behavior:**
The default width should probably remain the same, but the right-hand side of the card should indicate, upon mouse hover, that the div can be made wider/narrower, and click+dragging should widen/narrow the card.

**Alternatives considered:**
An alternative would be to choose a default width dynamically based upon the longest item in the list. However, I don't love this option, as (1) it requires us to handle cases where the required width would exceed the viewport, and (2) risks assigning awkwardly large widths due to a single long item in a list that may be full of otherwise quite short items.

**Use case:**
Attempting to use the data explorer to, well, explore one's data, can be a bit awkward if one's measurements/fields/tags are quite long.