[iOS] Clean up version info displayed on info screen

In the banner at the top of the info screen, we have Version: 10.x.y (build 10.x.y). I'm not 100% sure, but I think these are always the same numbers, so displaying both doesn't seem all that helpful. On small phones (5s), the text is too long to display without overlapping the word "Keyman". I think we should only display the version unless the build # is actually different.
On a separate, but related, note, I observe that almost no iOS apps actually display the app name in the main UI. If we were to remove "Keyman" from the banner, we'd have enough room for all the action icons, instead of having to display ...