i18n: Fix several untranslated texts and missing help tips
i18n: Use @trans to mark a bare string translatable

And allow for @context to add context to the bare string literal. For
instance,

    /* @trans, @context "noun" */ 'Open'

Would mark the string 'Open' translatable with context "noun".
Add statuses and flags selection to advanced search

Fix search backend to use the new statuses
Mark reopened tickets as un-answered
Go back to tickets page on reply

Always clear staff's drafts on successful reply
Remove errant reload
Use ticket state verb
Add translation context to ticket states

Add context to ticket state name (noun) and action (verbs)

Conflicts:

	include/class.forms.php