Comment 2 for bug 1865095

To test:

1) Edit your 'dashboard' page and add the 'My friends' block
2) Add another block to the page and try and select 'My friends' - you can't and it's not obvious why
3) Try and add a 'My portfolios' block - same problem

The reason is both these block can only be on page once but unless you are adding your new block to the top of the page you probably not get to see the error message there.

We need to error message to appear also in the config modal as well

Also the error shows the blocktype name of the block rather than the display name of the block, eg 'myviews' instead of 'My portfolios' so that will need fixing also