TODO
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-Optimization
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-
-Pre-compute what can be early in the build process:
-
-- the list of translatable (master) pages
-- for every translatable page, the list of slave pages
-
-... and/or memoize `istranslation`/`istranslatable` function calls.
-
Display available translations
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corresponding "master" page. The `add_depends` function can achieve
this, if used in a **FIXME** hook.
-The POT files should not be published on the wiki.
-
UI consistency: rename "Edit" button on slave pages
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