Sort Local hosts when loading

[rstad]

As mentioned in Issues #160 and #140, the list of hosts is not alphabetized in newer versions of macOS. This change is a feeble attempt by me to sort the hostsFiles array as it's populated.

It seems to have built successfully on my machine but I'm extremely new to the world of Obj-C development so it would not surprise me in the least if this does something in a bad or easily improved way.

That is, I added a way to Sort (NSSortDescriptor) and call it immediately after every time we addObject to hostsFiles during loadFiles in LocalHostsController.m.

Doing this after every addition seems like it might be a poor choice from a performance perspective. Moreover, it may be wholly unnecessary when used in some environments where this issue doesn't present. I went with it anyway because I didn't know how else to approach this, nor how to conditionally use this logic only when I know it to be necessary.

[oliveratgithub]

Tested this adjustment with #220 & works – (Local) Hosts files are sorted alphabetically from A-Z 👍

Before ==> After