I would like to remove menu pollution from the Project menu MRU with the Delete key (all MRUs could benefit from this as well). Currently, to remove items from the Project MRU, you have to go into Options->History->Project Menu, set the History size to a smaller value or zero (I just use zero). Then, exit and restart SE, now the MRU is trimmed or empty. However, there is no discrete control over what gets trimmed if you reduce the History size so setting it to zero is best to just wipe it out. Now, you have to go into Options->History->Project Menu->History size and set it back to a non-zero value.
The Find\Replace MRU drop-down already has this feature.
