One common annoyance is that if one hits the reload button for a
location in a target that then sometimes it seems nothing happens
especially if one has modified the repository shortly after using it,
for example there was an error that now is corrected or a local
repository was rebuild.

This can be fixed by
1) Edit the location
2) Hit "manage" button
3) Search for the offending site
4) Hit the "Reload" button

This then throws away some internal P2 state so the repository is
reloaded fresh.

This now changes the reload operation in a way that performs these steps
always when the user chooses to refresh an IU location.