Map - improve visual feedback of multiple-selecting markers and snackbar notifications when they are removed without direct user action

[bobular]

Currently there isn't great visual feedback when selecting a marker See from 00m35s in the video in this comment: https://github.com/VEuPathDB/web-monorepo/pull/588#issuecomment-1792724120

One option could be to highlight the popup at the same time.

Another could be to add a yellow fill to the geohash rectangle.

Going to discuss this in Map UX today.

Tacking on the snackbar work to this so here are some checkboxes:

• [x] improve visual feedback upon user clicking - solved with yellow outline of popup and no more dimming of marker on mouse-over
• [ ] improve feedback when markers are removed due to panning or zooming two snackbar notifications:
  • "marker selection has been cancelled because aggregation level has changed due to zooming"
  • "selected markers that went off-screen have been deselected"

[bobular]

I just noticed that the snackbar messages come up as a result of filtering. This was an inevitability of my simple approach - oops!

Example 1.

• Zoom in to Southern Africa + Madagascar
• Select markers in Madagascar then add a filter for country=Zimbabwe
• The Selected markers that went off-screen have been deselected message appears.

This could be ameliorated with some minor verbiage changes. The code that produces the message doesn't know about filters and subsets AFAIK.

Example 2.

• Select some markers
• Add a filter that removes all markers from the screen (e.g. country = Poland)
• The Marker selection has been cancelled because aggregation level has changed due to zooming message appears.

This is coming up because consolidatedMarkers.length is zero. This can be fixed with a new message for when there are no markers on the screen any more.