Keep search position when expanding a search result.

Currently, when you expand a search result, the extra space provided by the messages makes the current view completely change. I think it would be better if the current view in the search modal stayed the same, and Discord just scrolled accordingly so this was possible. You can see https://gyazo.com/4d77725ac4dec7e247eee277b6da1233.gif for an example of what it currently does which is annoying.