Per my last comment in #90 there is a performance issue when trying to do a Saved Search for a larger set of results and this causes a user experience issue since the user does not know why this is taking so long and may assume that the feature is timing out or not working.
Since this is only meant for super-users right now this work can be postponed till after 4.0 is released.
In a refactoring at c10cbd9 we lost the meaning of 0.0.0.0 which was
"Setting address to undefined (0.0.0.0)" so this commit makes the code
A note has been added that Saved Search may not play nicely with IP
Groups but this should probably be addressed along with the long list of
other Saved Search issues mentioned in the API Guide: #1364, #1813,
#1840, #1890, #1939, #2167, #2186, #2053 and #2543