Remove incompatible rules from sunburst.

 - Don't need these microscopic em that causes browser incompatibilities.
 - Clear that heading just in case.

Fixes: tracker item 3622.
Changelog.
... semicolons are hard.
Force all blocks to clear

- Not sure where the downward jogging is coming from but it seem to only
  affect Firefox.
Also insert the class into tables without clsas.
Changelog.
Support alternate links.
Changelog.
Inline Checkboxes.
Changelog.
New style skin entry definition.
Restore the plural form

- To be consistent with other entities in portal_skins.
- Also eliminate that potential main_template clash error.
Changelog.
Merge remote-tracking branch 'origin/master'
Merge branch 'master' into 2.1.x
IE8+ related fixes

- Add another check to eliminate that undefine object error.
- Add fake console.
Changelog.
Merge branch 'master' into 2.1.x
cellml.theme-2.1.5