[author] Fixed version typo in v1.2.6 JS file

Forgot to change the version to 1.2.6 when releasing the latest release.
[author] Updated Fluidbox to v1.2.7

Added a new option to determine how much the z-index should change
between different states of Fluidbox. Also fixed a minor issue with the
transitionend event not being unbound.
Minor updates for JS files
Merge pull request #2937 from terrymun/master

[author] Fixed typo in v1.2.6, more bug fixes for v1.2.7