Add sort by selected in Dialog "Edit project" under "Tables & views"
Its time consuming to scroll down to find the 5 checked tables within 400 tables in total. Please create some kind of a group/sort to show the selected on top or provide another toggle checkbox to show only the selected ones or all
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It is somewhat hidden, but you should be able to click on the header in the checkboxes to sort by this column. Does this help?
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Martin T. commented
indeed this helps a lot :) thanks for this hint!