Users have found that every time they search in certain forms a pop up box appears to ask if you want to cancel the search.
Search for a notice and a pop up box appears in either TMA1000, TMA1030, TMA3000 and TMA5000
This change was an enhancement request which was applied in fix 16. The main reason to implement this was to enable users to cancel a query. In a lot of cases users advised that they accidently did an open query (so not refining anything) and as a result the system then hung while it was trying to return all the results. This new feature is to help users cancel these type of queries which can also have impact on performance.
Fix 16 release notes: http://communities.bentley.com/products/assetwise/exor/m/mediagallery/269790.aspx