The ability to customize the tooltips for previously installed
plugins on a layer's right click context menu. For example, I could
have a custom implementation of a Layer that is backed by a custom
FeatureCollection. If I mark the layer as readonly, the "Editable" menu
item is correctly greyed-out. The tooltip says something like "This
layer cannot be made editable." The menu item is greyed-out ...
obviously it's not editable. I would like to change the tooltip to
explain *why* the menu item is greyed-out ... which is particular to my
"No Primary Key found on the underlying database table"
"Adhoc queries cannot be made editable"
"SQL Server DataStores cannot currently be made editable"