Don't create filter from table if a link is clicked

[lukasolson]

Prior to this PR, clicking on a link inside of a data table would have two results: The link would be opened in a new tab, and a filter would be added.

This PR checks if the target is a link, and only creates a filter if it is not a link. Filters can still be added for rows with links by clicking elsewhere in the row outside of the link.

Closes #3781.

[rashidkpc]

I'm thinking 4.1 on this one. I think the issue was marked 4.2 because we didn't think we'd be able to get to it.

[rashidkpc]

We should probably discuss if we should stick filter buttons or something in the blank space, it feels a bit weird to click somewhere off of the text to get a filter

[w33ble]

Functional, looks good. I'm wondering if it would be better to test for an href instead of just an anchor tag. Probably rare, but there could be a case where we have an anchor without an href that we still want to apply a filter with. If that sounds silly though, then this is GTG! 🐾

[w33ble]

@lukasolson as discussed, we want to distinguish what's going on with different cursors. Can you slap a cursor: cell or similar on the filterable cell - I think cell-hover is the class you want.

[w33ble]

Let's take this PR down to merge town! 🐳