Symphony.

In Symphony 2.2 the implementation of list item or table row selection has been modified. It now behaves like selections on operating systems:

• Clicking an item will select it.
• Clicking another item will deselect all other selected items and select the new one.
• Holding down the shift key while clicking multiple items creates a selection range.
• Holding the meta key (which is cmd on a Mac or ctrl on Windows) allows the selection of multiple items or the modification of an already selected range of items.
• Double-clicking outside the selection list will remove the selection.