Play list items with single-click, not double-click
Reason for the change
There isn't really a good reason to require a double-click to play these list items. For files and folders, this paradigm is used for items that can be selected and have actions which can be applied to them when selected, which does describe these list items. However they also have actions that appear on hover, blunting that reason. These list items already play on single-click on touch mode, mobile mode, and in party mode without any real issues, so let's just do the same thing in non-party desktop mode too.
Test plan
Click playlist, album, and track list items. Now They play, rather than becoming selected.
No changes in mobile, transient touch, or party mode--which already played on a single click/tap.