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
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.