Tree does not expand if there is only one child key

[lucymhdavies]

For example, I add a key like the following:

> set my:deep:key:name foo
OK

In Redis Browser, I only see the 'my', e.g.:

I can of course click on the full key name, and view it directly:

If I then add a second key, I see what I expect:

> set my:deep:key:name2 foo
OK

I have a good idea how to fix it, so I might have a PR soon