Add visual indicator that a search engine keyword has been recognised
This is really minor, but would make me terribly happy...
I make extensive use of the search engine keywords when searching - e.g. "w test" to search "test" on wikipedia, or "ama test" to search "test" on Amazon - and in Chrome when you do this, once the search keyword is recognised this is nicely highlighted in the address bar, which changes to a little spyglass icon and text to the effect of "Search [search engine name]."
Would it be possible to add a similar highlight to Opera? It works just the same regardless, but it's just a nice little additional visual cue that I've always appreciated.