16. The one or more non-transitory computer-readable media of claim 10 , wherein the plugin, when executed by the computing device, further causes the computing device to perform the step of forming the custom metadata filtering criteria by combining a filtering criteria expression obtained through a first graphical user interface control with a filtering criteria token obtained through a second graphical user interface control.
16. The one or more non-transitory computer-readable media of claim 10 , wherein the plugin, when executed by the computing device, further causes the computing device to perform the step of forming the custom metadata filtering criteria by combining a filtering criteria expression obtained through a first graphical user interface control with a filtering criteria token obtained through a second graphical user interface control. 18. The one or more non-transitory computer-readable media of claim 16 , wherein the second graphical user interface control is a selectable graphical user interface control associated with the filtering criteria token.