ui: Decode "+" in the query parameters as "%20"

I just copied the solution from here since it's been a while since
using functional languages and I didn't know the order of the parser,
but I suspect there are much better places to put this, including
repacing in `rest` above

Signed-off-by: James M Leddy <james.leddy@mongodb.com>

ui/app/src/Parsing.elm

@@ -34,7 +34,7 @@ urlParser url =
                 h :: rest ->
                     ( h, Just (String.concat rest) )
     in
-    case parse routeParser { url | query = query, fragment = Nothing, path = path } of
+    case parse routeParser { url | query = Maybe.map (String.replace "+" "%20") query, fragment = Nothing, path = path } of
         Just route ->
             route