BUGFIX i18n module load order in i18n::include_by_locale()

The "project" module (normally mysite) is considered with the highest priority. Yet, the project's i18n is loaded first and cannot overwrite existing translations. I've added a array_reverse(), so the iteration keeps the translation of the module with the highest priority.

Old $sortedModules: mysite, (other_modules,) cms, admin, framework.
New $sortedModules: framework, admin, cms, (other_modules,) mysite.
Merge pull request #2295 from JayDevlin/patch-1

BUGFIX i18n module load order in i18n::include_by_locale()