Follow symlinks when resolving theme paths.

Closes #4225
- If a theme is symlinked in the themes directory, follow
  the symlink so that the theme object is populated correctly.
- Only do the fallback loading of theme data in the validations
  module if it doesn't exist in config.
Refactor settings and content wrappers to allow smooth overflows and properly show headers on mobile

Closes #4186, Closes #4190, Closes #4150

- Alters markup to allow for correct use of `-webkit-overflow-scrolling: touch;`
- Updates the debug page to use the same markup as the rest of the settings page
- Solve floating tag bar issue by making it absolute, not fixed
Reset password signs the user in

Closes #4196
- Clear confidential info on leaving reset route
- Remove nested password access, because gross
- Also cleaned up some .then(f, h) to .then(f).catch(h) in setup controller
Merge pull request #4230 from novaugust/reset-signs-in

Reset password signs the user in
Merge pull request #4187 from PaulAdamDavis/settings-fixes

Refactor settings & content wrappers
Merge pull request #4226 from jaswilli/issue-4225

Follow symlinks when resolving theme paths.
Moving nanoscroller to be managed by bower
Merge pull request #4237 from ErisDS/nanoscroller

Moving nanoscroller to be managed by bower
Clean up hardcoded ghost paths

closes #4144
- made contributors template use the `gh-path` helper
- Removing blogRoot from application.js
- made error image use the `gh-path` helper
Merge pull request #4163 from mattiascibien/issue-4144

Clean up hardcoded ghost paths
Refactor auth form styles

Closes #4246

- Removed the input wrapper background colour
- Moved `:focus` styles to one element, so its not defined separate for each page
- Removed unnecessary MQ for body background colour (it changed nothing)
Merge pull request #4249 from PaulAdamDavis/fix-signin-styles

Refactor auth form styles
Implement popovers