[BUG] Web app doesn't properly remember prints selected for deletion

[puterboy]

If I select some prints for deletion in the Print History screen, then select an individual print to look at (this actually happens a lot accidentally if you aim for the delete button and miss), then go back to the Print History there is the following inconsistency

• The Print History screen still (appropriately) shows the current items selected for deletion with checkmarks in each of the selected checkboxes
• The summary in the top left header shows no items selected (even though there are all the original checkboxes)
• If you further select new items, the summary counts only the new selections (even though the old selections still show)
• Pressing Delete only deletes the new selections and no the old ones

This is not only confusing but a PITA since it is very easy to miss clicking on the checkbox which causes you to go to a detail page but then you lose everything that you previously selected and have to start all over again.

Ideal fix would be to remember what was previously selected in the summary box in the top left header.
If not that, then at least uncheck the boxes if they no longer are active for consistency and clarity.