Search overlay is too small when choosing a merge target

[Gavin Panella]

On +register-merge, if I click Choose... and enter a search term into the overlay that appears, I cannot read the whole branch name in the search results. I sometimes add suffixes to branch names to distinguish them, but I cannot read them if the branch name is long.

It's not a huge problem because I can work around it without too much bother, but it would be better if the overlay resized accordingly, was resizeable manually, wrapped the results, or had a scrollbar.