fix(s): spelling mistakes, and external link handling on login page

[Motordom]

What type of PR is this?

• bug

What this PR does / why we need it:

homebox\frontend\pages\item[id]\index.vue

• Resolved spelling error for Model Number
• Fixes Spelling mistake when viewing item page #64

homebox\frontend\pages\index.vue

• Updated Discord and Docs links to open in new tabs/windows, following the behaviour of the GitHub and Twitter links
• Fixes How external links on the login page open is inconsistent #66

homebox\frontend\pages\items.vue

• Resolved spelling error for second occurrence of Labels, changing it to Locations
• Fixes Spelling mistake in filters when viewing items page #67

Which issue(s) this PR fixes:

Fixes #64
Fixes #66
Fixed #67

Release Notes

- Resolved spelling error for Model Number on item page
- Updated Discord and Docs links to open in new tabs/windows, following the behaviour of the GitHub and Twitter links on the login page
- Resolved spelling error for second occurrence of Labels in the filter section on the items page, changing it to Locations