The UX for the modal would be improved if the blocks were displayed within the UI as "Cards" as opposed to a stacked list.
D10.3.10 Umami with:
Create two Block categories under the LBB config pages - one open by default and one closed by default. Add two Blocks to each with some images on both.
Use a Card layout for each block with each image sat above the block description, so multiple blocks appear horizontally across the page. Tis would make better use of the modal window's size and shape, which currently looks a bit bare. Resize the image, so it always fits within the card and all descriptions align even when the source images have different aspect ratios. Better CSS for hover would further improve the UI.
Something like this:
Active
1.7
User interface