Update content_bottom.php

[CoverUp]

Prevent double call and fix notices about undefined index, also fix order according priority.

[danielkerr]

not worth the effort!

[CoverUp]

I think this is a good improvement...
just consider this example
you got a latest module, on oc_layout_module, code field: latest.31
current code will call module/latest without parameter, because
if (isset($part[0]) && $this->config->get($part[0] . '_status')) is true and is executed first
but calling latest without module will show the undefined $setting['limit'] warning, plus you are already running module/latest with all the others calls on it.
After this failed call, the if (isset($part[1])) part will execute, this time with success because you got the parameter.

So for each module on the layout the double call will be present, perhaps is negligible but they will sum , for the other hand the fix is also easy, so why don't fix it?