Link Manager 0.7.0 - Some API updates

I mostly worked on updating the code base and rearranged some of the components a little.

What's Changed

• Add class for external file config by @Mosblinker in #74
• Move update check panel into file by @Mosblinker in #75
• Create panel for external locations by @Mosblinker in #76
• Add capacity to external location details by @Mosblinker in #77

Full Changelog: 0.6.1...0.7.0