AMOS can only cope with string identifiers with a length < 100
characters. Our tooling for Tiny automatically generates string idents
based on the language string and these can end up longer.
This change modifies our generated idents to be capped at 90 characters.
Part of MDL-75966
Add support for translation of the TinyMCE interface.
TinyMCE translates English language strings rather than keys, and a tool
to perform this translation is included.
Andrew Nicols