There is a plugin named "Select one source" by JP Rosevear <email address hidden>: "Select a single calendar or task source for viewing". Mariano, who is the author of your plugin? Is it the the plugin that you refer to?
There is a plugin named "Select one source" by JP Rosevear <email address hidden>: "Select a single calendar or task source for viewing". Mariano, who is the author of your plugin? Is it the the plugin that you refer to?