Iterate over objects and copy over primitives and arrays
instead of using _.merge, as merge will not replace a config
entry completely. For arrays in a target object, the arrays
will have its indices replaced. This means if a source array
is empty, the target array will be left alone. Similarly,
if the target array is longer than a source array, there
will be indices not touched in the target array.

This makes it possible for the following URL params to work:

config.p2p.enabled=true&config.p2p.preferH264=true

Make 'Add jwt module to react' work on mobile.