Add condition to deleting marker floaters logic

[jernestmyers]

Resolves #427

Previously, deleting a floater always invoked setActiveVisualizationId(undefined). Now, we'll only do so if the viz being deleted is the active viz.

NOTE
The deletion will update analysisState, causing the loader to spin on the active viz. This may be another thing to consider when we have our deep think about our data requests. As a user, I'd be a bit confused why deleting a non-active viz results in a loading state. This issue feels a bit out of scope for this ticket, but perhaps it's not? Thoughts on if I should investigate further in the context of this ticket, or should it wait until our proper deep think?

[dmfalke]

This is good. Regarding the spinner, I didn't see it in my test. I had a timeseries plot open when I deleted a line plot. Maybe it depends on the type of the open viz?

[bobular]

I agree we should review the data call dependency logic.

I'll see if I can reproduce the spinner thing later/next week.