Forms: attention classes colour now use $red

Fixes gh-1254
Closes gh-1410
Merge pull request #1533 from nschonni/fix-form-attention-colour-new-1410

Forms: attention classes colour now use $red
Removed dependency on metadata plugin for all but formvalid.js. Corrected a few typos in session timeout i18n strings.
Merge branch 'v3.0' of https://github.com/wet-boew/wet-boew into v3.0
Merge pull request #1535 from pjackson28/v3.0

Removed dependency on metadata plugin for all but formvalid.js
Fixed JSHint issues in tabbedinterface.js
Set default table background colour to white in Grids SCSS. Prevents outer visual properties from appearing behind cells in extremely wide tables.
Upgraded PE getData function to use JSON parsing where data- includes JSON and a fallback where malformed (for backwards compatibility with metadata.js). Also updated working examples to use JSON strings.
Corrected working examples.
Merge pull request #1538 from pjackson28/v3.0

Upgraded PE getData function to use JSON parsing
Extended reduction of dependency upon metadata.js and resolved merge conflicts.
Fixed JS error from use of now private $.colorbox.launch().
Merge branch 'v3.0'
Updated to ColorBox 1.4.4.
Merge branch 'v3.0'
Added tabindex='-1' to objects for SVG logos to prevent them from getting keyboard focus.
Merge pull request #1536 from duboisp/feature-chart-graph

Labels Charts working example (uniformtick and labelposition options)
Merge pull request #1537 from EricDunsworth/v3.0-table-background

Set default table background colour to white in Grids SCSS. Prevents out...
Merge branch 'v3.0'
Fixed display of WET theme SVG logos for RTL. Fixed display of SVG logos in GCWU intranet mobile view. Implemented extends/placeholders for multiple SCSS files.